中国带食蚜蝇属Epistrophe Walker三新种记述(双翅目:食蚜蝇科)

THREE NEW SPECIES OF THE GENUS EPISTROPHE WALKER (DIPTERA: SYRPHIDAE) FROM CHINA

本文记述了我国食蚜蝇科带食蚜蝇属Epistrophe Walker三新种:毛缝带食蚜蝇(E.setifera Chu et He)、南京带食蚜蝇(E.nankinensis Chu et He)和华丽带食蚜蝇(E.spledida Chu et He)、所有模式标本保存于江苏省农业科学院植物保护研究所昆虫标本室。

Three new species of the genus Epistrophe Walker (Diptera: Syrphidae)are described in this paper. All specimens are diposited in the insect collection of the Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences. 1 Epitrophe setifera Chu et He sp. nov. Male: Frons dull yellow, heavily pale-dusted and black-haired, lunula brown. Face yellow with yellowish hairs except bare central prominence. Holoptic suture with a few black hairs, Antenna unicolorous yellow, the third segment elliptical. For profile of head see fig. 1C. Mesonotum brilliant black, yellow-haired and dusted. Scutellum yellow with yellow hairs,mixed with some black ones in the posterior edge. Wing pale yellow, stigma yellow. Legs yellow, except hind tarsis darkened. For abdominal partern see fig. 1D. Sternite pale yellow. Genitalia: See figs. 1E-1H. Surstylus large and broad, typically shaped. Lingula short and broad; surperior lobes rather large. Distal portion of aedeagus trumpet-shaped, apically with strong minute erect spinules. Length:13 mm; Wing:11 mm. Holotype: ♂, Ning'an (Jinbo Lake), Helongjiang prov. 7-ⅤⅢ-1989, Collected by He Jilong. This new species differs from other species of the genus in follwing respects: The large body size, holoptic suture with a few black hairs and difference abdominal pattern and the shape of pyxis of the male genitalia. 2. Epistrophe nankinensis Chu et He sp. nov. Male: Frons brownish yellow, black-haired and heavily yellow-dusted, lunula and upper portion shining black. Face very wide, about one half width of head, yellow, heavily pale-dusted and yellow-haired except for the bare central prominence ,upper mouth edge darkened. Antenna yellow, dorsal part of the third segment with a little brown. For profie of head see fig. 2C. Mesonotum shining black. Scutellum dull yellow with yellow hairs, mixed with some black ones in posterior portion. Wing clear, stigma yellow, Legs mainly yellow, basal one fifth of anterior and middle femora, and dorsal part of the tarsis darkened: hind femora short black-haired, hind tibiae and tarsis borwn with yellow hairs. For abdominal pattern see fig. 2E. Sternite pale yellow. Genitalia: See figs. 2E-2I. Surstyli large and broad, typically shaped: Lingula broad, truncated apically: surperior lobes large. Distal portion of aedeagus trumpet-shaped with dorso-posteriorly convex, apically two third with minute erect spinules. Female: Similar to the male. Vertex about one fifth width of head. Frons yellowish brown. Antenna yellow with a little darker. Length:12.5-13mm; Wing: 12mm. Holotype:♂, Allotype: ♀, Partypes: 6♂♂ 1♀; Nanjing, 15-Ⅳ-1984; Collected by Chu Xiping The new species differs from the other species of the genus in the following respects: The larger frontal angle, widened face and the difference of pyxis and ligula of the male genitalia. 3 Epistrophe splendida Chu et He sp. nov. Male: Frons dark yellow, black-haired and heavily yellow-dusted, lunula and upper portion shining black. Face retract, yellow with densely yellow hairs and dust except for the bare central prominence, upper mouth edge black. Antenna yellowish with the third segment dorso-apically dark brown. For profile of head see fig.3C. Mesonotum shining golden brilliant, yellow-haired and dusted Scutellum yellow with posterior half black-haired. Wing clear, basal part and stigma yellow. Legs yellow, except apical one third of hind femora, hind tibiae and 1-3 tarsis brownish black. For abdominal pattern see fig. 3D, Sternite pale yellow. Genitalia: See figs. 3E-3H. Surstylus large and broad, typically shaped; Lingula broad, truncated apically; surperior lobes large. Distal portion of aedeagus trumpet-shaped with dorso-posteriorly convex, apically two third with minute erect spinules. Female: Similar to the male. Vertex about one sixth width of head. Frons black brown, the out-sides of lunula yellow, Antenna black with 1-2 segments ventrally and third segment base-ventrally brownish yellow. Length:10-12 mm: Wing: 10mm. Holotype: ♂, Allotype: ♀, Paratype: ♂: Nanjing, 8-Ⅴ-1984; Collected by Chu Xiping This new species differs from the other species of the genus in the following respects: Vertexis is long and narrow. Mesonotum and mesopleuron are golden brilliant, abdominal pattern and the shape of pyxis of the male genitalia.