Five new species of Dolichomitus Smith from the tropical Andes, with a key for the South American species (Hymenoptera, Ichneumonidae, Pimplinae)

Abstract Dolichomitus Smith is a widely distributed pimpline genus with more than seventy known species. There are eight species previously reported from South America: D. annulicornis (Cameron), D. bivittatus Townes, D. hypermeces Townes, D. jatai Loffredo & Penteado-Dias, D. longicauda Smith, D. megalourus (Morley), D. moacyri Loffredo & Penteado-Dias and D. zonatus (Cresson). In this paper, we describe five new species: D. mariajosae Araujo & Pádua, sp. nov., D. menai Araujo & Pádua, sp. nov., D. orejuelai Araujo & Pádua, sp. nov., D. pimmi Araujo & Pádua, sp. nov., and D. rendoni Araujo & Pádua, sp. nov. All have been collected in cloud forests in the Colombian tropical Andes. An illustrated key to the South American species of the genus is also provided.


Introduction
The Darwin wasps are among the most species-rich branches of the tree of life, with approximately 25,000 species belonging to 41 subfamilies (Yu et al. 2016;Klopfstein et al. 2019). At the same time, it is one of the groups for which our taxonomic knowledge most severely lags behind their actual diversity (Klopfstein et al. 2019). The Pimplinae are one of the best studied subfamilies in the Neotropical Region, mainly due to the taxonomic revisions performed by Ian Gauld (e.g. Gauld 1991;Gauld et al. 1998Gauld et al. , 2002. However, recent studies continue to reveal new species of this subfamily in this region (e.g. Gómez et al. 2014;Sääksjärvi et al. 2015;Bordera et al. 2016;Palacio et al. 2018;Palacio et al. 2019;Pádua et al. 2020), as well as expanding the distribution records for some of it genera (Pádua et al. 2019a(Pádua et al. , 2019b. These studies indicate that unsampled areas have great potential for revealing new species to science, especially considering that few areas of South America were sampled adequately (Gómez et al. 2009).
Herein we describe five new species of Dolichomitus and provide the first identification key for the species present in South America.

Materials and methods
Morphological terminology follows Broad et al. (2018). The information contained in "Type Material" sections corresponds to the specimen labels verbatim. The specimens will be deposited in the Universidad de los Andes (UNIANDES) entomological collection in Bogotá, Colombia, under "ANLA collection permit of specimens of the biological diversity" (curator Emilio Rialpe).
The specimens examined in this study were all collected with sweeping net and manual collection during an inventory carried out in the Mesenia-Paramillo Natural Reserve (5°29'46.1"N, 75°53'20.5"W) between February and December 2019, in the department of Antioquia, Colombia. This is a private conservation area of 3,500 ha located in the western Andes, more specifically in the Northwestern Andean montane forest ecoregion, which is among the most diverse regions on the planet (see Pádua et al. 2019a).
Drawings were adapted from Gauld (1991) and vectorized by Adobe Illustrator. Photographs were prepared using a Canon EOS 5D Mark IV and 5DSR, and Canon EF 100mm f/2.8 IS USM and MP-E 65mm f/2.8 1-5X macro lenses and edited with Adobe Photoshop (v. CS5), or a Leica DMC4500 digital camera attached to a Leica M205A stereomicroscope and combined using the software Leica Application Suite V4.10.0. All measurements were rounded to the nearest 0.05. Diagnosis. The genus can be identified by the following combination of character states: (1) clypeus not divided in anterior and posterior parts; (2) clypeal margin narrow, apically bilobate; (3) occipital carina more or less complete, mediodorsally dipped, sometimes weak; (4) propodeum with a trace of the lateromedian longitudinal carinae discernible anteriorly; (5) fore wing with 3rs-m present; (6) hind wing with distal abscissa of CU present, joining cu-a either closer to 1AA than to M, or closer to M than to AA; (7) male (in most species) with middle coxa modified in one or two concavities on outer surface and basal, apical and/or centrally tubercles; (8) female with basal lobe on tarsal claws; (9) tergite II with oblique groves cutting off depressed triangular areas anterolaterally; (10) male with sternite IX transverse, posteriorly slightly convex; (11) ovipositor 3.00-13.00× as long as hind tibia; (12) upper valve smooth and lower valve of ovipositor laterally expanded to partially enclose upper valve.

Key to the South American species of Dolichomitus
[The males of D. bivittatus Townes, D. hypermeces Townes, D. longicauda Smith, D. mariajosae sp. nov., D. menai sp. nov., D. orejuelai sp. nov., D. pimmi sp. nov. and D. rendoni sp. nov Head almost yellow with vertex brown; occipital region, central frons and mandible black; fore wing yellowish with anterior margin more fuscous, pterostigma yellow (Fig. 1L) Propodeum with a central and anterior smooth area, strongly and evenly broadened posteriorly so that near to the hind margin is more than twice as broad as anteriorly (Fig. 1N Head. Antenna with 34 flagellomeres, first flagellomere 3.80× as long as width. Gena smooth with setiferous punctures, 0.50× as long as eye (Fig. 2D), in frontal view almost straight and moderately constricted below eyes (Fig. 2C). Vertex smooth and shiny, with isolated setiferous punctures. Posterior ocellus separated from eye 1.35× its maximum diameter. Distance between hind ocelli 1.25× maximum diameter of posterior ocellus. Face with fine, setiferous punctures. Clypeal sulcus slightly curved. Clypeus 3.25× as broad as medially long, almost flat. Clypeus with long erect setae on its surface and small setae across all its margins. Anterior tentorial pits conspicuous. Malar space 0.30× as long as basal mandibular width. Mandible bidentate, 2.05× as long as basal width (front view).
Metasoma. Tergite I ca. 1.75× as long as posteriorly wide, shiny, with fine and relatively dense setiferous punctures, more extended laterally (Fig. 2F); spiracle near its anterior 0.40; dorsolateral carinae of first metasomal tergite weak, present on petiole and postpetiole. Posterior membranous section of first metasomal sternite ca. 0.50 of length of tergite. Tergite II ca. 1.20× as long as posteriorly wide, shiny, with fine and relatively dense setiferous punctures, more extended laterally and posteriorly. Ovipositor slender, evenly down curved at distal 0.15, ca. 4.40× as long as hind tibia ( Fig. 2A); upper valve of ovipositor smooth; apex of ovipositor with expanded area of lower valve bearing ca. 11 teeth, with most proximal 5 vertical; ovipositor sheath ca. 1.30× as long as body, and ca. 4.20× as long as hind tibia, bearing fine dense hairs which are ca. 0.75× as long as width of sheath.
Color. Head mostly yellow with mandibles apically, frons, stemmaticum (extending to outer orbit dorsally), a narrow longitudinal stripe on vertex, dorsal half of occipital carinae, scape, pedicel, and flagellum black; scape ventrally and malar space infuscate. Mesosoma mostly yellow with anterior, posterior, and inner margin of propleuron, a narrow longitudinal stripe on pronotal collar dorsally (dorsally extending to pronotum), anterior margin of pronotum (connecting with mesoscutum), posterior margin of pronotum, subtegular ridge, lateral and central longitudinal stripes on mesoscutum, two marks on the lateral margins of mesoscutum (just above tegula), scuto-scutellar groove, posterior margin of scutellum, anterior margin and axilla posteriorly, anterior and posterior margins of metanotum, epicnemium (with a small rounded projection toward speculum), anterior and dorsal margin of mesopleuron, mesopleural furrow, anterior margin of mesepisternum, anterior and posterior margin of metapleuron, submetapleural carina anteriorly, anterior and posterior margin of propodeum, a triangle mark dorsally based on the posterior margin that projects itself towards the anterior margin through a narrow longitudinal stripe, black. Fore leg mostly yellow with a dorsal spot on coxa, posterior margin on coxa, anterior spot on trochanter, femur ventrally, tibia dorsally, tarsus black. Mid leg mostly yellow with anterior and posterior margin of coxa, anterior margin of trochanter, ventral stripe on femur, dorsal stripe on tibia, tarsus, black; trochantellus infuscate. Hind leg mostly yellow with anterior (projecting ventrally), posterior (projecting dorsally) margins of coxa, anterior and posterior margins trochanter, trochanter ventrally, trochantellus, anterior and posterior margins of femur, ventral stripe on femur, anterior and posterior margins of tibia, dorsal stripe on tibia, tarsus black ( Fig. 2A, B, F). Wings hyaline with strongly contrasting apical darkened area that covers only the distal half of fourth submarginal cell, pterostigma dark brown (Fig. 2G). Metasoma mostly yellow, tergite I with lateral and posterior margins, lateral spots (near spiracle) and a median longitudinal stripe reaching ca. 0.70 of tergite I; a dorsolateral mark on anterior margin and a band on the posterior margin of tergites II-IV, a dorsal mark on tergites VI-VIII, ventral corner of the posterior margin of tergites V-VI, black. Ovipositor dark brown and ovipositor sheath black.
Distribution. Colombia. Etymology. The specific epithet is in honor of Maria Jose Valencia, daughter of Carlos Eduardo Valencia, Colombian entrepreneur, who supports conservation initiatives in the Andes and Chocó ecoregions, and enjoys the natural world and the challenges of exploring the outdoors.
Biological note. Host unknown.
Comments. Dolichomitus mariajosae sp. nov. is most similar to the D. zonatus (Cresson, 1874), D. cantillanoi Gauld, 1991, andD. annulicornis (Cameron, 1886) mainly for the color pattern of the body yellowish with black marks, but this new species differs mainly for the fore wing with black spot in the apex (yellowish with anterior margin strongly yellow in D. annulicornis and D. zonatus, and entirely yellowish in D. cantillanoi).

Dolichomitus menai Araujo & Pádua, sp. nov.
http://zoobank.org/AF3875BF-C9F5-411E-BA97-52D608350FEB Fig. 3A-G Diagnosis. Dolichomitus menai sp. nov. may be distinguished from other Neotropical species by the combination of the following characteristics: head mostly black with clypeus predominantly dark brown, anterior margin of clypeus, inner orbit, frontal orbit, outer orbit yellow; fore leg mostly black with ventral surfaces of femur and tibiae yellow; wings iridescent rainbow colors with strongly contrasting subapical darkened area, pterostigma black; areolet not petiolated; malar space 0.55× as long as basal mandibular width; areolet ca. 1.80× as wide as height; fore wing with vein 1cu-a vertical; hind wing with proximal abscissa of CU slightly inclivous and straight; metasoma mostly black, with posterior membranous section of first metasomal sternite, sternites II-VI and part of sternite VII white; ovipositor sheath ca. 1.25× as long as body, and ca. 3.60× as long as hind tibia.
Head. Antenna with 31 flagellomeres, first flagellomere 4.50× as long as width. Gena smooth with setiferous punctures, in dorsal view somewhat rounded, 0.60× as long as eye, in frontal view almost straight and moderately constricted below eyes (Fig.  3C). Vertex smooth and shiny, with very isolated setiferous punctures. Posterior ocellus separated from eye 1.05× its maximum diameter. Distance between hind ocelli 0.65× maximum diameter of posterior ocellus. Face with fine, setiferous punctures. Clypeal sulcus slightly curved. Clypeus 2.70× as broad as medially long, almost flat. Clypeus with long parallels setae on its surface and small setae across all its margins. Anterior tentorial pits conspicuous. Malar space 0.55× as long as basal mandibular width. Mandible bidentate, 2.25× as long as basal width (Fig. 3C). Mesosoma. Pronotum polished, with fine and scattered setiferous punctures (Fig.  3D). Epomia present. Mesoscutum shiny, with moderately dense setiferous punctures. Notauli deep, reaching ca. 0.20 of length of mesoscutum. Mesopleuron shiny, with relatively dense setiferous punctures. Epicnemial carina strong. Metapleuron shiny, with scattered setiferous punctures, ca. 1.40× as long as height. Submetapleural carina strong, enlarged anteriorly, reaching ca. 0.55 of metapleuron length, its anterior end slightly curved up. Propodeum shiny, with fine and scattered setiferous punctures, denser anteriorly, in dorsal view 1.25× as long as medially wide. Propodeal spiracle elliptic, just above the pleural carina. Pleural carina strong, culminating posteriorly in a small propodeal crest. Hind leg with femur ca. 7.90× as long as height and ca. 0.70× as long as tibia. Fore wing with vein 1cu-a interstitial to M&Rs; areolet ca. 1.80× as wide as height; vein 1cu-a vertical, vein 2m-cu slight curved. Hind wing with vein M+CU almost straight; vein cu-a ca. 2.50× as long as proximal abscissa of CU; vein cu-a reclivous and straight; proximal abscissa of CU slightly inclivous and straight; distal abscissa of CU present, reaching wing margin (Fig. 3G).
Metasoma. Tergite I ca. 1.80× as long as posteriorly wide, shiny, with fine and relatively dense setiferous punctures, more extended laterally (Fig. 3F); spiracle near its anterior 0.40; dorsolateral carinae of first metasomal tergite weak, present on petiole and postpetiole. Posterior membranous section of first metasomal sternite ca. 0.25 of length of tergite. Tergite II ca. 1.20× as long as posteriorly wide, shiny, with fine and relatively dense setiferous punctures, more extended laterally and posteriorly; ovipositor slender, evenly down curved at distal 0.20, ca. 4.65× as long as hind tibia (Fig. 3A); apex of ovipositor with expanded area of lower valve bearing ca. 11 teeth, the most proximal 2 vertical; ovipositor sheath ca. 1.25× as long as body, and ca. 3.60× as long as hind tibia, bearing fine dense hairs which are ca. 1.35× as long as width of sheath.
Color. Head mostly black with most of clypeus dark brown, anterior margin of clypeus, inner, frontal and outer orbit (but frons, stemmaticum and vertex, black) and temple yellow. Mesosoma entirely black shinning (Fig. 3B). Fore leg mostly black with ventral surfaces of femur and tibiae yellow. Mid and hind legs entirely black. Wings with iridescent rainbow colors with strongly contrasting apical darkened area that at least covers completely the fourth submarginal cell and third discal cell, pterostigma black (Fig. 3G). Metasoma mostly black shinning, with posterior membranous section of first metasomal sternite, sternites II-VI and part of sternite VII white (there are some randomly black spots on the sternites II-VII varying between the specimens) ( Fig. 3A, B, F); ovipositor dark brown, darker on tip. Ovipositor sheath black.

Distribution. Colombia.
Etymology. The specific epithet is in honor of Luis Fernando Mena for his continued support of the Mesenia-Paramillo nature reserve in the acquisition of forested areas for conservation. Mr. Mena is known for his support of important causes and has supported many NGO's in Colombia that have an important social impact.
Biological note. Host unknown. Comments. Dolichomitus menai sp. nov. is most similar to the D. hypermeces Townes, 1975, D. irritator (Fabricius, 1775) and D. longicauda Smith, 1877 mainly by black color of body. However, this new species differs mainly by having ovipositor sheath < 1.50× as long as body (except D. irritator) and the fore wing hyaline with strongly contrasting subapical darkened area, pterostigma black (entirely infumate and ovipositor sheath > 3.00× as long as body in D. longicauda; yellowish with pterostigma black in D. irritator; and brown with a broad pale yellowish brown band on apex and ovipositor sheath > 3.00× as long as body in D. hypermeces).

Dolichomitus orejuelai Araujo & Pádua, sp. nov.
http://zoobank.org/7DCDBD61-6051-490B-B66E-F3DC1CFC13B3 Fig. 4A-G Diagnosis. Dolichomitus orejuelai sp. nov. may be distinguished from other Neotropical species by the combination of the following characteristics: head and mesosoma mostly reddish black; metasoma mostly yellowish brown with anterior half of tergite I dorsally, posterior margin of tergites II-V, a semicircular dorsal spot based on the anterior margin of tergite V, tergites VI-VIII reddish black; face with abundant setiferous punctures; malar space 0.30× as long as basal mandibular width; mandible bidentate, 1.40× as long as basal width; hind leg with femur ca. 5.50× as long as height; wings yellowish, pterostigma light brown; areolet not petiolated; dorsolateral carinae of first metasomal tergite present on petiole and stronger on postpetiole; posterior half of tergite II and tergites III-V densely and strongly punctuate; ovipositor sheath ca. 1.10× as long as body, and ca. 3.00× as long as hind tibia.
Head. Antenna with 32 flagellomeres, first flagellomere 4.50× as long as width. Gena smooth with setiferous punctures, in dorsal view somewhat rounded, 0.55× as long as eye (Fig. 4E), in frontal view almost straight and moderately constricted below eyes (Fig. 4C). Vertex smooth and shiny, with setiferous punctures. Posterior ocellus separated from eye 1.30× its maximum diameter. Distance between hind ocelli 0.85× maximum diameter of posterior ocellus. Occipital carina complete. Face with abundant setiferous punctures. Clypeal sulcus curved. Clypeus 3.20× as broad as medially long, almost flat. Clypeus with long parallels setae on its surface and small setae across all its margins. Anterior tentorial pits conspicuous. Malar space 0.30× as long as basal mandibular width. Mandible bidentate, 1.40× as long as basal width (front view).

Etymology.
The specific epithet is a tribute to Jorge Enrique Orejuela Gardner, National Geographic 2007 Buffet prize winner for his work over three decades in Colombia on conservation education, protected area management and sustainable development. His accomplishments include the establishment of the cloud forest nature reserve La Planada, also helped establish Utría and Gorgona Island national parks, and the Quindío Basin and Calima River nature reserves. His mentoring for the creation of the Mesenia-Paramillo nature reserve was key to the success of this conservation project.
Biological note. Host unknown. Comments. Dolichomitus orejuelai sp. nov. is most similar to the Neotropical species D. rufescens (Cresson, 1865), D. grilloi Gauld, 1991, D. flacissimus Gauld, Ugalde & Hanson, 1998and D. bivitattus Townes, 1975 mainly by color pattern reddish black or brown on the body. But this new species differs from D. bivitattus by having ovipositor sheath < 1.50× as long as body (> 3.50 in D. bivitattus) and differs from D. flacissimus by having fore wing yellowish with pterostigma light brown (infumate with pterostigma brown in D. flacissimus). Differs mainly from D. grilloi by having posterior ocellus separated from eye 1.30× its maximum diameter (0.80-0.90× in D. grilloi) and differs from D. rufescens by having metasoma mostly yellowish brown with anterior half of tergite I dorsally, posterior margin of tergites II-V, a semicircular dorsal spot based on the anterior margin of tergite V, tergites VI-VIII reddish black (entirely reddish in D. rufescens). Diagnosis. Dolichomitus pimmi sp. nov. may be distinguished from other Neotropical species by the combination of the following characteristics: general pattern of general color (orange yellow with various specifics black marks; wings yellowish with strongly contrasting apical darkened area, pterostigma light brown; areolet not petiolate; malar space 0.30× as long as basal mandibular width; mandible bidentate, 2.55× as long as basal width (front view); tergite I ca. 2.20× as long as posteriorly wide; ovipositor sheath ca. 0.90× as long as body, and ca. 3.00× as long as hind tibia.
Head. Antenna with 32 flagellomeres, first flagellomere 4.50× as long as width. Gena smooth with setiferous punctures, in dorsal view somewhat rounded, 0.50× as long as eye, in frontal view almost straight and moderately constricted below eyes (Fig.  5C). Vertex smooth and shiny, with isolated setiferous punctures. Posterior ocellus separated from eye 1.40× its maximum diameter. Distance between hind ocelli 0.85× maximum diameter of posterior ocellus. Face with fine, setiferous punctures. Clypeal sulcus curved (Fig. 5C). Clypeus 3.45× as broad as medially long, almost flat. Clypeus with long parallels setae on its surface and small setae across all its margins. Anterior tentorial pits conspicuous. Malar space 0.30× as long as basal mandibular width. Mandible bidentate, 2.55× as long as basal width (front view).
Mesosoma. Pronotum polished, with fine and scattered setiferous punctures. Epomia present. Mesoscutum shiny, with moderately dense setiferous punctures (Fig.  5D-E). Notauli deep, reaching ca. 0.30-0.40 of length of mesoscutum. Mesopleuron shiny, with relatively dense setiferous punctures. Epicnemial carina strong. Metapleuron shiny, with scattered setiferous punctures, ca. 1.70× as long as height. Submetapleural carina strong, enlarged anteriorly, reaching ca. 0.65 of metapleuron length, its anterior end slightly curved up. Propodeum shiny, with fine and scattered setiferous punctures, denser laterally, in dorsal view 1.20× as long as medially wide. Propodeal spiracle elliptic, just above the pleural carina. Pleural carina complete and strong, culminating posteriorly in a small propodeal crest. Hind leg with femur ca. 6.60× as long as height and ca. 0.70× as long as tibia. Fore wing with vein 1cu-a more or less interstitial to M&Rs; areolet 1.50× as wide as height; vein 1cu-a and vein 2m-cu slightly curved. Hind wing with vein cu-a ca. 2.60× as long as proximal abscissa of CU; vein cu-a reclivous and straight; proximal abscissa of CU vertical; distal abscissa of CU present, reaching wing margin (Fig. 5G).
Metasoma. Tergite I ca. 2.20× as long as posteriorly wide, shiny, with fine and relatively dense setiferous punctures, more extended laterally (Fig. 5F); spiracle near its anterior 0.35; dorsolateral carinae of first metasomal tergite weak, present on petiole and postpetiole. Posterior membranous section of first metasomal sternite ca. 0.30 of length of tergite. Tergite II ca. 1.20× as long as posteriorly wide, shiny, with fine and relatively dense setiferous punctures, more extended laterally and posteriorly; ovipositor slender, evenly down curved at distal 0.30, ca. 3.40× as long as hind tibia (Fig. 5A); upper valve of ovipositor smooth; apex of ovipositor with expanded area of lower valve bearing ca. 10 teeth, the most proximal 3 subvertical; ovipositor sheath ca. 0.90× as long as body, and ca. 3.00× as long as hind tibia, bearing fine dense hairs which are ca. 1.10× as long as width of sheath.
Color. Head mostly orange yellow with mandibles apically, frons, stemmaticum (extending to outer orbit dorsally), a longitudinal stripe on vertex, dorsal half of occipital carinae, scape dorsally, pedicel and flagellum black. Mesosoma mostly orange yellow with pronotal collar dorsally (dorsally extending to pronotum), posterior margin of pronotum, tegula dorsally, subtegular ridge, lateral and central longitudinal stripes on mesoscutum, scuto-scutellar groove, ventral and posterior margin of scutellum, posterior margin of axilla, metanotum posteriorly, epicnemium ventrally, anterior and dorsal margin of mesopleuron, anterior margin of mesepisternum, anterior and posterior margin of metapleuron, a narrow strip over the submetapleural carina, anterior and posterior margin of propodeum, a triangle mark dorsally based on the posterior margin that projects to the center of propodeum, black. Fore and mid legs mostly orange yellow with a dorsal mark on the anterior margin of coxa, tarsi V on fore and mid leg and tarsal claws, black. Mid leg with tarsi II-IV dark brown. Hind leg mostly dark brown (infuscate) with the coxa orange yellow; posterior half of trochanter and anterior half of femur dark yellow; anterior and posterior margin of coxa, posterior margin of tibia and tarsus, black (Fig. 5A, B, F). Wings yellowish with strongly contrasting apical darkened area that covers only the distal half of fourth submarginal cell, pterostigma light brown (Fig. 5G). Metasoma mostly orange yellow with anterior half of tergite I, posterior half of tergite V, tergites VI-VII and posterior margin of tergite VIII yellow. Lateral spots and an anterior dorsal longitudinal stripe on tergite I, posterior margin of tergites I-IV, tergite VIII black. Anterior margin of tergites VI and VII with a dark brown spot dorsally. Ovipositor dark brown and ovipositor sheath black.
Type material. Holotype. 1 ♀, Colombia, Jardín, Antioquia, El Alto, Mesenia-Paramillo nature reserve (1800m-3000m elevation), 5°29'45.8"N, 75°53'21.3"W, entomological net, 09-III-2019, coll Cosmos Prize -among the most prestigious honors in the environmental field -for his research on endangered species and his work to help reverse species' declines by protecting their shrinking habitats. His support of the Mesenia-Paramillo nature reserve conservation project to restore areas and reconnect forest fragments has been invaluable.
Biological note. Host unknown. Comments. Dolichomitus pimmi sp. nov. is most similar to D. mariajosae sp. nov. mainly by the pattern color of the body yellowish with black marks and the fore wing with a strongly contrasting apical darkened area, but this new species differs mainly by the fore wing yellowish with pterostigma light brown, hind wing with proximal abscissa of CU vertical, ovipositor ca. 3.40× as long as hind tibia and ovipositor sheath ca. 3.00× as long as hind tibia (fore wing hyaline with pterostigma dark brown, hind wing with proximal abscissa of CU inclivous, ovipositor ca. 4.40× as long as hind tibia and ovipositor sheath ca. 4.20× as long as hind tibia in D. mariajosae sp. nov.).

Dolichomitus rendoni Araujo & Pádua, sp. nov.
http://zoobank.org/A42CEA69-EC56-4F69-954E-56B92EAB9839 Fig. 6A-G Diagnosis. Dolichomitus rendoni sp. nov. may be distinguished from other Neotropical species by the combination of the following characteristics: malar space 0.35× as long as basal mandibular width; mesosoma mostly red with the tegula white; wings yellowish, pterostigma dark brown; areolet slightly petiolate; fore leg with a white concavity on it postero-dorsal margin; fore and mid legs mainly white; hind wing with vein cu-a ca. 1.20× as long as proximal abscissa of CU; metasoma mostly reddish black with ventro-lateral spots on tergites III-IV, lateral of tergites V-VIII red (except for the posterior margin of tergites V and VI laterally reddish black); posterior margin of tergite I-VII with a white band dorsally (small and narrow on tergite I); posterior membranous section of first metasomal sternite ca. 0.60 of length of tergite; ovipositor sheath ca. 0.90× as long as body, and ca. 2.90× as long as hind tibia.
Head. Antenna with 31-34 flagellomeres, first flagellomere 4.20× as long as width. Gena smooth with setiferous punctures, in dorsal view somewhat rounded, 0.55× as long as eye (Fig. 6E), in frontal view almost straight below eyes (Fig. 6C) Propodeum shiny, with fine and scattered setiferous punctures, denser laterally, in dorsal view 1.05× as long as medially wide. Propodeal spiracle elliptic (Fig. 6D-E). Pleural carina complete and strong. Hind leg with femur ca. 5.60× as long as height and ca. 0.80× as long as tibia. Fore wing with vein 1cu-a interstitial to M&Rs; areolet slightly petiolate, 1.60× as long as height; vein 1cu-a and vein 2m-cu slightly curved. Hind wing with vein cu-a ca. 1.20× as long as proximal abscissa of CU; vein cu-a reclivous and straight; proximal abscissa of CU vertical; distal abscissa of CU present, reaching wing margin.
Metasoma. Tergite I ca. 1.40× as long as posteriorly wide, shiny, with fine and relatively dense setiferous punctures, more extended laterally (Fig. 6F); spiracle near its anterior 0.45; dorsolateral carinae of first metasomal tergite present on petiole and stronger on postpetiole. Posterior membranous section of first metasomal sternite ca. 0.60 of length of tergite. Tergite II ca. 1.20× as long as posteriorly wide, shiny, with fine and relatively dense setiferous punctures, more extended laterally. Ovipositor slender, evenly down curved at distal 0.12, ca. 3.60× as long as hind tibia (Fig. 6A); apex of ovipositor with expanded area of lower valve bearing ca. 10 teeth, the most proximal are 2 vertical, followed by 2 subvertical; ovipositor sheath ca. 0.90× as long as body, and ca. 2.90× as long as hind tibia, bearing fine dense hairs which are ca. 0.90× as long as width of sheath. Color. Head and antenna entirely reddish black. Mesosoma mostly red with propleuron, pronotal collar, anterior margin of pronotum, two marks on the lateral margins of mesoscutum (just above tegula), subtegular ridge, scuto-scutellar groove, axilla, metanotum anteriorly, a narrow mark on the ventro-anterior margin of epicnemium, a narrow mark on the ventral half of mesopleural furrow, a narrow mark on the ventral margin of mesepisternum, propodeum reddish black. Tegula white, with posterior margin infuscate. Fore leg mostly white with the dorsal surface of femur (except for a white concavity on it postero-dorsal margin), ventral surface of tibia and tarsus reddish brown. Mid leg mostly white with the dorsal surface of femur (except for a white spot on it postero-dorsal margin), ventral surface of tibia, tarsi II-V reddish brown (tarsus I infuscate). Hind leg mostly reddish brown with the ventral surface of trochanter and trochantellus, posterior 0.70 of the dorsal surface of tibia white; coxa and ventral surface of femur red (Fig. 6A, B, F). Wings yellowish, pterostigma dark brown (Fig. 6G). Metasoma mostly reddish black with ventro-lateral spots on tergites III-IV, lateral of tergites V-VIII red (except for the posterior margin of tergites V and VI laterally reddish black). Posterior margin of tergite I-VII with a white band dorsally (small and narrow on tergite I). Ovipositor dark brown and ovipositor sheath reddish black.
Variation. There are some paratypes with body length (17.50 mm), fore wing length (15.95 mm) and the coloration (posterior margin of propodeum red; width of the dorsal white bands narrower on the posterior margin of tergites II-IV).
Distribution. Colombia. Etymology. The specific epithet is in honor of Ubiel Rendon, park ranger at the Mesenia-Paramillo nature reserve. A La Mesenia village native and once an avid hunter, his knowledge of the surrounding forests has been key for monitoring wildlife and helping with long-term studies using camera traps. He has made several important contributions to the scientific world, finding multiple new species of amphibians, reptiles and orchids at the reserve, including this Darwin wasp named in his honor.
Biological note. Host unknown. Comments. Dolichomitus rendoni sp. nov. is most similar to D. orejuelai sp. nov. mainly by the pattern color reddish black on head, antenna, propleuron, pronotal collar, anterior margin of pronotum and propodeum dorsally, besides the yellowish wings. But this new species differs by having the areolet slightly petiolate, hind wing with vein cu-a ca. 1.20× as long as proximal abscissa of CU, pterostigma dark brown and the pattern color mostly white on fore and mid legs (areolet not petiolate, hind wing with vein cu-a ca. 2.25× as long as proximal abscissa of CU, pterostigma light brown and the pattern color mostly red on fore and mid legs in D. orejuelai sp. nov.).