Two new species of the leafhopper genus Calodia Nielson (Hemiptera, Cicadellidae, Coelidiinae) from China, with a checklist and key to Chinese species

Abstract Two new species of the leafhopper genus Calodia Nielson are described and illustrated: C. quadrimaculasp. nov. from Guizhou and Yunnan Provinces and C. zuoaesp. nov. from Yunnan Province, China. A checklist along with distribution and a key to species based on male genitalia of the genus Calodia from China are provided. Olidiana nigritibiana (Li), comb. nov. (earlier in the genus Calodia) is proposed. At present, this genus comprises 45 known species worldwide, of which 19 species are recorded from China.


Introduction
The genus Calodia (Hemiptera, Cicadellidae, Coelidiinae) was described by Nielson (1982) with Calodia multipectinata as the type species. Calodia is a relatively small genus of leafhoppers widely distributed throughout Asia and also the Pacific (Indonesia and the Philippines). In recent taxonomic studies on Coelidiinae, Nielson (2015) revised the classification of Coelidiini by reassigning the species to several new genera and dealt with six new species of Calodia, provided a revised key to species of Calodia and also an updated catalogue of the species; of these, two species were from China. Nielson (2015) also resurrected Lodiana nigritibiana Li, 1988 and placed it in the genus Calodia. Li and Fan (2017) and Viraktamath and Meshram (2019) described new species of the genus from China and India, respectively. So far, there has been a total of 17 species from China.
In this paper, two new species of Calodia from China are described together with a checklist to Chinese species of the genus and a key for their separation. Lodiana nigriti biana Li, 1988 was resurrected from synonymy and transferred to the genus Calodia by Nielson (2015: 13, 83), however, examination of the aedeagus of this species shows that it has one apical process which is bifurcate apically, a character of a number of species of Olidiana. Therefore, Olidiana nigritibiana (Li), comb. nov. is proposed here.

Materials and methods
All specimens described in this study were collected by sweep net. Morphological terminology follows mainly Nielson (2015). Other methods follow Fan et al. (2014). Habitus photographs were obtained using a Keyence VHX-6000 system. Illustrations of male genitalia were drawn with Adobe Illustrator CS6 software. These images were combined using the photomerge command in Adobe Photoshop CS6 software.
The type specimens of the new species and other materials examined are deposited in the Institute of Entomology, Guizhou University, Guiyang, China (GUGC), under the following accession numbers: C. quadrimacula sp. nov.: #CCW9043; C. zuoae sp. nov.: #CCW9065.
Coloration. Ground color brown. Crown yellow with two pairs of brown spots medially, ocelli black (Fig. 14). Face (Fig. 16) with clypeus and clypellus black; area between laterofrontal sutures and eye yellow. Pronotum (Fig. 14) dark brown, with yellow markings. Mesonotum (Fig. 14) with basal triangles and one round spot on either side of median line anterior to scutoscutellar suture, black. Venation black, with numerous, small, brown spots. Legs (Fig. 15) dark brown to black.
Male genitalia. Pygofer with caudal lobe (Fig. 17) broadly triangular in lateral view. Subgenital plate (Fig. 19) long with base slightly broad, sparsely setose apically. Style (Figs 20, 21) well developed, base expanded, apex bilobed, with a subapical short spur. Connective (Fig. 18) Y-shaped with stem short. Aedeagal shaft (Figs 22-23) sinuated, ventral margin in lateral view with angular projection slightly distad of half length, curved apically in lateral view, apex with group of spines, with two subapical retrose processes arising on same side, distal process about twice as long as proximal one, with outer margin, serrate proximal process glabrous; gonopore large, subapical, situated laterally more proximal than proximal process.
Etymology. The new species name is derived from the words "quadri" and "macu la", referring to the scutellum with four black plaques.
Distribution. China (Guizhou, Yunnan).  Zhang, 1994, but differs in the structure of aedeagal shaft processes and the aedeagal shaft.
Coloration. Ground color blackish. Head with crown brown; clypellus with median narrow yellowish stripe; area between lateral frontal sutures and eyes ochraceous (Figs 24,26). Forewing with numerous, small, ivory to yellow spots.
Morphology. Head, narrower than pronotum, anterior margin broadly rounded; crown broad, slightly broader than width of one eye, slightly produced beyond anterior margin of eyes, eyes about ⅔ width of pronotum (Fig. 24); clypeus wide and short, without middle longitudinal ridge; clypellus slender, apex wider (Fig. 26). Pronotum large, nearly twice as long medially as crown wider than long (Fig. 24). Scutellum large, nearly twice as long medially as pronotum.
Etymology. The new species is named after Ms Qin Zuo who collected the holotype. Remarks. The new species closely resembles C. lii but differs in the structure of aedeagal shaft processes, i.e., aedeagal shaft processes have finer and denser setae in C. zuoae compared to sparse and elongate secondary spines in C. lii; the shorter process has setae confined to apex of the process in C. zuoae and in C. lii the spines on the shorter process are along entire lateral margin; the setae on longer process in C. zuoae are confined to an area proximad of the midlength on the outer margin of the process and in C. lii the sparse spines are found in the distal ¾ length and they are on both margins of the process in the distal ⅓.