150 R. W. CROSSKEY 



(black abdomen contrasting with yellow pollinose mesonotum, general appearance 

 much as Tachinini to naked eye) . . Undetermined genus & species (? gen. n.) 



29 Four stpl setae ............ 30 



- Three stpl setae or (rarely) only two ........ 33 



30 Facial ridges setose on almost all their height, strongly bowed in profile. Hind 



tibia with a very strong pd preapical seta, <J with proclinate orbital setae 



PROSOPODOPSIS Townsend (part) 



- Facial ridges bare or at most weakly haired on lowermost third, not obviously 



bowed in profile. Hind tibia without pd preapical seta. 0* without proclinate 

 orbital setae ............ 31 



31 Wing with bend of vein M forming a gentle even curve. Upper occiput with black 



setulae behind the postocular row. Palpi normal, slightly dilated apically 



BACTROMYIA Brauer & Bergenstamm (part) 



- Wing with bend of vein M forming a sharp right-angle. Upper occiput without 



black setulae behind the postocular row. Palpi unusually slender ... 32 



32 Mid tibia with one isolated submedian ad seta. Ocellar setae present and very 



strong. Abdominal Ti + 2 with a pair of erect median marginal setae 



'Erycia' takanoi Baranov (? genus) 



- Mid tibia with two strong ad setae and sometimes some smaller setulae in addition. 



Ocellar setae absent. Abdominal Ti + 2 without median marginal setae 



'Alsomyia' anomala Villeneuve (? genus) 



33 Legs entirely reddish yellow. Hind tibia with a strong pd preapical seta. . . 34 



- Legs black or brownish black, at most only the tibiae yellowish. Hind tibia with 



or without a pd preapical seta ......... 35 



34 Facial ridges distinctly visible in profile. Second costal sector haired ventrally. 



Abdominal T4 with a pair of erect median discal setae. Basicosta orange-yellow. 

 Upper occiput with black setulae behind the postocular row 



ERYTHROCERA Robineau-Desvoidy 



- Facial ridges not visible in profile. Second costal sector bare ventrally. Abdominal 



T4 without discal setae. Basicosta brownish black. Upper occiput without 

 black setulae behind the postocular row 'Erycia' rufofemorata Baranov (? genus) 



35 Second costal sector haired ventrally. Wings usually rather short and broad, 



with deep subcostal cell and gently rounded bend to vein M . Upper occiput 



with black occipital setulae behind the postocular row ..... 36 



- Second costal sector bare ventrally. Wings not unusually short and broad, 



subcostal cell narrow and bend of vein usually rather abruptly or very sharply 

 angulate. Upper occiput with or without black occipital setulae ... 38 



36 Hind tibia without a pd preapical seta ........ 37 



- Hind tibia with a very strong pd preapical seta (even larger than the d preapical 



seta) EURYSTHAEA Robineau-Desvoidy (part) 



37 Facial ridges bare. Ocellar setae present, o* without proclinate orbital setae 



BACTROMYIA Brauer & Bergenstamm (part) 



- Facial ridges setulose on most of their height. Ocellar setae absent or almost so. 



Frontal setae conspicuously reclinate. o* with proclinate orbital setae 



ELODIA Robineau-Desvoidy 



38 Head with two pairs of reclinate orbital setae. Head shape in profile not con- 



spicuously subtriangular .......... 39 



- Head with one pair of reclinate orbital setae. Head shape in profile more strongly 



subtriangular than usual .......... 45 



39 Facial ridges setose on at least half their height. Upper occiput without black 



setulae behind the postocular row. <J with proclinate orbital setae. Hind 



tibia usually with a pd preapical seta ........ 40 



