Bombyliinae

Yao, Gang & Evenhuis, Neal L., 2016, First record of Bombylisoma Rondani (Diptera: Bombyliidae) from China and an identification key to the Chinese genera of Bombyliinae, Zootaxa 4137 (2), pp. 281-285 : 281-282

Key to genera of Bombyliinae from China

1. Wing with discal cell broadest apically, crossvein m-m meets m-cua at an obtuse angle; radial sector broad with costa tending to bulge forwards near apex of wing ..................................................................................................................................................... 2

-. Wing with discal cell broadest near middle, crossvein m-m meets m-cua at not much more than a right angle; radial sector not enlarged with costa more or less straight along fore margin of wing................................................................................................ 3

2. Antennal scape greatly swollen; mid-tibial spur present; vein R1-R2+3 present in some species (2 or 3 submarginal cells) ( Fig. 5 ); abdomen elongate ovate; body hairs long .......................................................................................................... Conophorus Meigen

-. Antennal scape at most only moderately swollen; mid-tibial spur absent; vein R1-R2+3 absent (2 submarginal cells) ( Fig. 8 ); abdomen elongate ovate or short and broad; body hairs short. ........................................................................................ Tovlinius Zaitzev

3. Head usually as broad as thorax; hind-margin of eyes indented; wings often small, narrowed at base with at least alula reduced; hind femora often without macrochaetae; body usually more elongate even narrow conical or cylindrical, macrochaetae usually weak often hair-like especially those posterior to the wings............................................................................................................. 4

-. Head usually distinctly narrower than thorax; eyes not indented on the hind-margin; wings usually large, broad at base with anal lobe, alula and squama well-developed; hind femora always with well-developed macrochaetae on underside; body always broad, macrochaetae usually well-developed ...............................................................................................................................................5

4. Cell r5 closed and with penultimate segment of R5 as long as apical segment( Fig. 1 ), cell br only as long as bm; Pulvilli present; body hair long and dense, often coarse and with abundant macrochaetae .............................................. Anastoechus Osten Sacken

-. Cell r5 open ( Fig. 9 ), Pulvilli well-developed; male terminalia with gonocoxite without prominent crest; parameral sheath, bear-

ing paired horn-like outgrowths ...................................................................................................................... Bombylisoma Rondani 5. Cell br (first basal) longer than cell bm (second basal), r-m sometimes equal to m-m; vestiture various, often with black hair and/ or scale patches; wing pattern various, sometimes with a clear-cut dark infuscation and/or with isolated dark spots ( Fig. 3 ) ........ 6

-. Cell br equal in length to bm; r-m usually much shorter than m-m, occasionally almost as long ( Fig. 7 ); vestiture fine and silky with a clipped appearance at least on occiput and thorax, hair white to straw-yellow or brown shading to paler on underside; wing infuscation, if present, diffuse and darker along fore border. ................................................................................... Systoechus Loew

6. Small size (less than 10mm); wing completely infuscated ( Fig. 6 ) .................................................................... Euchariomyia Bigot

-. Large size (usually over 10mm); wing with some hyaline parts.......................................................................................................7

7. Scape at least 3 x length of pedicel; small, relatively slender flies with relatively long, slender legs; alula long and narrow, squama reduced; vestiture usually predominantly black, hair long and tufted, usually with metallic or opalescent scales in spots on frons and often on thorax and abdomen ...................................................................................................... Bombylella Greathead

-. Scape at most 3 x length of pedicel; more robust and compact flies with shorter, less slender legs; alula broad, squama not reduced; vestiture often pale yellow to brown, if black without spots of metallic or opalescent scales ........................................... 8

8. Scape about twice length of pedicel; upper facets of eyes of males not enlarged; face short and with short sparse hair only; wing base black, remainder hyaline or tinged yellowish ( Fig. 2 ); hair short and with a clipped appearance usually with abundant black elements contrasting with areas of white, orange or grey................................................................................ Bombomyia Greathead

-. Scape more than twice length of pedicel; upper facets of eyes of males enlarged; face long, prominent and with long hair; wing pattern, if present, basicostal often diffuse and sometimes with isolated spots, wing rarely completely infuscated ( Fig. 4 ); hair usually long, sometimes tufted and rarely with a clipped appearance, usually predominantly white to yellow or brown with few black elements, if predominantly black then without a contrasting pattern of pale hair ..................................... Bombylius Linnaeus

Figures

FIGURES 1 – 8. Wings. 1. Anastoechus chinensis Paramonov; 2. Bombomyia discoidea Fabricius; 3. Bombylella nubilosa Yang, Yao & Cui; 4. Bombylius major Linnaeus; 5. Conophorus chinensis Paramonov; 6. Euchariomyia dives Bigot; 7. Systoechus ctenopterus Mikan; 8. Tovlinius pyramidatus Yao, Yang & Evenhuis.

FIGURES 9 – 10. Bombylisoma resplendens Brunetti. 9. Wing; 10. Female body, lateral view.