106 D. W. COQUILLETT. 



8. — Abdomen furnished with black scales 9. 



Abdomen destitute of black scales tMriliis Coq. 



9. — Hind femora with long hairs besides the bristles below, fa(^e sparse, yellow- 

 ish tomentose desertiiS Coq. 



Hind femora with bristles, but no long hairs below, face destitute of to- 



mentum. scriplus Coq. 



10. — Abdomen destitute of black scales 11. 



Abdomen furnished with black scales 14. 



11. — Pile of front white or yellow 12. 



Pile of front black 24. 



12. — Styliform portion of third antennal joint as long as the thickened basal 



part, scales of front usually sparse 13, 



Styliform portion two-thirds as long as the thickened basal part, front con- 

 cealed beneath a dense covering of white scales, knob of halteres light 



yellow pavidus Coq. 



irj. — Hind femora with at the most some bristles, but no long hairs below 20. 



Hind femora with many long hairs below, hypopygium not longer tlian last 



two segments luarcidiis Coq. 



14— Knob of halteres largely or wholly light yellow , 17. 



Knob of halteres dark brown 15. 



1.5. — Styliform portion of third antennal joint scarcely longer than the thick- 

 ened basal part 16. 



Styliform portion twice as long as the thickened basal part, cross-bauds of 

 black scales on abdomen of female not interrupted in the middle. 



Ill 11*$ O. S. 

 16. — Cross-bands of black scales on abdomen of female interrupted in the middle. 



iiiterruptn!« Coq. 



Cross-bauds not interrupted brevistylus Coq. 



17. — Styliform portion of third antennal joint twice as long as the thickened 



basal part 22. 



Styliform portion scarcely longer than the thickened basal part 23. 



18. — Cross bands of black scales on abdomen of female more than four times as 



broad as those of light-colored scales carboiiariiis O. S. 



Cross-bands of black scales scarcely wider than those of light-colored scales, 



abdomen of male broad and elliptical Iiirsutiis Coq. 



19. — Pile of face golden-yellow capax Coq. 



Pile of face white illixtus Coq. 



20. — Hypopygium of male more than one-half as long as the abdomen, pile of 

 face white, hind margin of scutellum opaque and scaly. 



abnorniis Coq. 



Hypopygium very smalL.. 21. 



21. — Knob of halteres laigely dark brown, pile of face yellowish white, hind 

 margin of scutellum shining and bare, except in the middle. 



couuriis O. S. 



Knob of halteres light yellow 25. 



22.— Pile of front black ...IS. 



Pile of front white, hind margin of scutellum shining Cattlliis n. sp. 



23. — Pile of front black, hind margin of scutellum subopaque and scaly 19. 



Pile of front white, spots of black scales on abdomen, in two rows. 



VII I pec II la n. sp. 



