﻿A new species of Entedon Dalman (Hymenoptera, Eulophidae) and three newly recorded species from China

﻿Abstract In this paper, a new species of Entedon Dalman, E.flavifemursp. nov. is described from Tibet and three species, E.albifemur Kamijo, E.crassiscapus Erdös, and E.nomizonis Kamijo are reported from China for the first time. A detailed description and illustrations of the new species are provided, as well as diagnoses and illustrations of the three newly recorded species.


Introduction
Species of genus Entedon Dalman, 1820 (Hymenoptera, Eulophidae, Entedoninae) are considered to primarily parasitize the larvae of weevils, bark beetles (Coleoptera, Curculionidae), and bean weevils (Coleoptera, Chrysomelidae, Bruchinae) which bore into tree trunks, wood, and seeds (Schauff 1988;Askew 1991).The genus Entedon can be separated from other genera in Entedoninae by the following characters: head and thorax strongly sclerotized, with conspicuous reticulation; antenna usually with 3-segmented funiculus and 2-segmented clava, and sometimes with five flagellar segments separated from each other, not forming an obvious clava; frontal sulcus often absent, although well developed in some species; mandibles bidentate; scutellum convex; propodeum mostly smooth (rarely reticulate) with single median carina that may split and diverge anteriorly; propodeal spiracle on an elevated area; and fore wing with cubital setal line and basal setal line usually absent or incomplete, rarely complete (Gumovsky 1997;Majeed et al. 2021).ZooKeys 1172: 1-14 (2023), DOI: 10.3897/zookeys.1172.104676 Ming-Rui Li & Cheng-De Li: A new species and three newly recorded species of Entedon from China The genus Entedon contains 187 species worldwide, of which 185 species were recorded in the Universal Chalcidoidea Database (Noyes 2019), and two species were described more recently by Majeed et al. (2021) from India.There are 14 species known from China: seven species (E.betulae Yang, E. broussonetiae Yang, E. pini Yang, E. pumilae Yang, E. tumiditempli Yang, E. wilsonii Yang, E. yichunicus Yang) were described by Yang (1996) during an investigation of parasitic wasps on bark beetles in China; two species (E.epicharis Huang, E. zanara Walker) were reported by Wang et al. (1991), both reared from the larvae of Agrilus suvorovi Obenberger; five species (E.abdera Walker, E. gracilior Graham, E. methion Walker, E. punctiscapus Thomson, E. squamosus Thomson) were reported by Zhu and Huang (2001), Zhu and Huang (2002), and Zhang et al. (2007) during the taxonomic study on Eulophidae from Zhejiang, Guangxi, and Gansu provinces of China, respectively.
In this paper we record four additional species: E. flavifemur is described as new to science; and E. albifemur Kamijo, 1988, E. crassiscapus Erdös, 1944and E. nomizonis Kamijo, 1988 are reported from China for the first time.The detailed description and illustrations of the new species, diagnoses and illustrations of three new recorded species are provided.

Materials and methods
Specimens were collected by sweep nets, yellow-pan traps, and Malaise traps from northeast and southwest China, and were fixed on triangular cards or dissected and mounted in Canada Balsam on slides following methods described by Noyes (1982).Photographs were taken with an Aosvi AO-HK830-5870T digital microscope or a digital CCD camera attached to an Olympus BX51 compound microscope.The quality of these images was improved by using Helicon Focus 7 and Adobe Photoshop 2020.Measurements were made using the built-in software of Aosvi AO-HK830-5870T.
Terminology follows the Hymenoptera Anatomy Consortium (2023), and the following abbreviations are used:   2C, F-H); propodeum smooth, without reticulation (Fig. 2D, E); fore wing with an oval-shaped infuscate spot below MV (Figs 1, 2J); lower surface of costal cell with a row of short setae close to SMV and extending from base to 2/3 length of the cell (Fig. 2J).
Description.Female.Body length 2.2-2.4 mm, mainly metallic green.Vertex and face metallic green, the latter with golden-red reflections, and interantennal area with golden-violet reflections (Fig. 2B).Eyes and ocelli dark reddish brown.Antenna with scape yellow to pale yellow, pedicel and flagellum dark brown with weak bluish green reflections (Figs 1, 2C).Mesosoma and metasoma metallic green, with golden-yellow or copper reflections (Fig. 2E).All legs with coxae metallic green; trochanters, femora, and tibiae yellow to pale yellow; first three tarsomeres white to pale yellow and 4 th tarsomere brown to dark brown (Figs 1, 2F-H).Fore wing with an oval-shaped infuscate spot below MV (Fig. 2J).
Mesosoma (Fig. 2D, E), 1.5× as long as wide.Pronotum, mesoscutum, mesoscutellum, and metascutellum with coarse polygonal reticulation, only lateral panels of metanotum and propodeum smooth, without any trace of reticulation.Pronotum short, with weak transverse pronotal carina.Median area of the mesoscutum with two pairs of setae, and posterior margin slightly emarginate.Notauli incomplete and indicated posteriorly by a depression.Mesoscutellum 1.15× as long as wide, oval-shaped, with one pair of setae.Metascutellum very short.Propodeum long, ~ 0.42× as long as mesoscutellum, with single median carina which split and diverge anteriorly, without plica.Fore wing broad, ~ 2× as long as wide, lower surface of costal cell with a row of short setae close to SMV and extending from base to 2/3 length of the cell (Fig. 2J).Basal cell with four setae.Speculum small, and open towards base of wing.STV and PMV short, ratio of length of SMV:MV:PMV:STV ~ 5.4:12.8:1.3:1.0.Hind wing 3.4× as long as wide, apex rounded (Fig. 2K).Legs with metatibial spur slightly curved, longer than the width of apex of tibia (7:5), but not reaching apex of basal tarsomere (Fig. 2F-H).
Etymology.The specific name refers to the yellow femora (flavus is Latin for yellow).
Remarks.Entedon flavifemur sp.nov. is close to E. magnificus (Girault & Dodd, 1913) (Girault 1913).Based on the re-description of E. magnificus by Gumovsky et al. (2015), the two species share the following characteristics: body mainly metallic green with golden-yellow or copper reflections in some parts; scape, all femora and tibiae yellow to pale yellow; and propodeum smooth and shiny.The new species differs from E. magnificus in having F1 subconical, distinctly longer than F2 (vs.F1 subcircular, only slightly longer than F2 in E. magnificus); fore wing with an oval-shaped infuscate spot below MV (vs.hyaline in E. magnificus); speculum small (vs.distinctly larger in E. magnificus); petiole longer than wide (vs.wider than long in E. magnificus); and propodeum without longitudinal channel on both sides of median carina (vs.with longitudinal channel in E. magnificus).Diagnosis.Female.Antenna mainly dark brown, with bluish green or purple reflections, only base of scape white.All femora and tibiae white, protibia with one longitudinal brown to dark brown stripe dorsally, coxae metallic bluish green (Figs 3, 4F-H).Head strongly reticulate, with smooth transverse area above clypeus and well-developed frontal sulcus (Fig. 4A, B).Antennal scape slender, 5.2× as long as wide; pedicel ~ 2.5× as long as broad; F1 2.3-2.7× as long as wide, 1.0-1.2×as long as pedicel (Fig. 4C).Median area of propodeum with dense reticulation, but callus smooth (Fig. 4D, E).Fore wing hyaline; speculum closed; costal cell bare, with anterior margin slightly curved (Fig. 4J).Petiole quadrate or slightly wider than long.Gaster distinctly shorter than mesosoma.
Male.Not collected from China.According to Kamijo (1988), differs distinctly from female as follows: scape swollen in median part, 2.5× as long as wide; pedicel 2× as long as wide; funicular segments separated by distinct petioles.
Host.Unknown.Distribution.China (Liaoning Province) (new record), Japan (Kamijo 1988), Far East Russia (Gumovsky 1998).Remarks.The two specimens we collected from Bailangshan National Nature Reserve have the F1 twice as long as wide, shorter than those of the type specimens, and barely longer than the F2; other characteristics are the same as in the type.Diagnosis.Female.Antennal scape dark brown to black, with bluish green reflections.All femora dark brown to black with metallic bluish green reflections in proximal 1/2 to 2/3 of its length, the remainder is white; all trochanters and tibiae white, only protibiae with a dark brown longitudinal stripe (Figs 5, 6G-I).Head strongly reticulate; frontal sulcus present and nearly complete; gena straight (Fig. 6A).Antenna with F1 almost as long as pedicel, 1.7× as long as broad, slightly longer than F2; the latter 1.5× as long as broad; F3 quadrate or slightly transverse (Fig. 6B).Fore wing hyaline, costal cell bare, speculum closed (Fig. 6D).Scutellum only slightly longer than broad.Propodeum densely reticulated (Fig. 6C).Petiole slightly wider than long.Gaster slightly shorter than mesosoma.
Male.Clearly differentiated from female as follows: scape swollen in median part, 2.7× as long as wide (Fig 7B ); F3 distinctly longer than wide; propodeum longer than in female.

Figure 2 .
Figure 2. Entedon flavifemur Li & Li, sp.nov., paratype, female, on slide A, B head, frontal view C antenna D, E mesosoma F-H fore, mid and hind leg, respectively I metasoma J fore wing, red arrows show the row of short setae on lower surface K hind wing.Scale bars: 100 μm.

Figure 4 .
Figure 4. Entedon albifemur Kamijo, female, on slide A, B head, frontal view C antenna D, E mesosoma F-H fore, mid and hind leg, respectively I metasoma J fore wing K hind wing.Scale bars: 100 μm.

Figure 6 .
Figure 6.Entedon crassiscapus Erdös, female, on slide A head, frontal view B antenna C mesosoma D fore wing E hind wing F metasoma G-I fore, mid and hind leg, respectively.Scale bars: 100 μm.

Figure 7 .
Figure 7. Entedon crassiscapus Erdös, male, on slide A head, frontal view B antenna C mesosoma D fore wing E hind wing F metasoma G-I fore, mid and hind leg, respectively.Scale bars: 100 μm

Figure 8 .
Figure 8. Entedon nomizonis Kamijo, female, on slide A head, frontal view B antenna C mesosoma D fore wing E hind wing F metasoma G-I fore, mid and hind leg, respectively.Scale bars: 100 μm.