4 KANSAS UNIVERSri'V gUARI'KRI.N'. 



Hind tibiit somewhat infuscaled at the tip ; fourth joint of 



male fore tarsi not broader tlian the preceding 



s///h-///a/us, Lo^w-. 



32. Only the last joint of the male fore tarsi enlarged ./'(?//////>;-, Lot-^^'- 



The last two joints enlarged '. 33 



The last three joints enlarged ; third and fuurtli white, fiftli 



black dakotftisis, n. s;^- 



2,2,- Hind femora of male ciliated cudactyhis, Loew. 



Hind femora of male not ciliated to/isi/s, Loew. 



34. Last joint of male fore tarsi enlarged tener, Loew. 



Fore tarsi of male plain 35 



35. Wings hyaline with a grayish tinge varial>///s, Loew. 



Wings hyaline with a yellowish tinge hiteipennis, Loew. 



Sub-group b: tegula; with black cilia. 



36. Fourth longitudinal vein broken 37 



Fourth longitudinal vein not broken 43 



37. Dorsum of thorax yellow poUinose, opaijue. . . .bifractus, J^oew. 

 Dorsum of thorax geren, more or less shining 2,^ 



38. Antennae black 39 



Antennas yellowish-red 40 



39. Fore coxai dark obco/i/a/i/s, n. sp. 



Fore coxfe yellow rainifer, Loew. 



40. Hind tarsi and tips of of tibia; black reflectiis, n. sp. 



Hind tibia; and basis of hind tarsi yellow 41 



41. Tarsi of the male plain vittatiis, Loew. 



Tarsi of male fringed with black at tip 42 



42. Hind femora of male ciliated; wings normal. . . . cupriiiiis, Loew. 

 Hind femora not ciliated ; wings narrowed at base 



longipeiDiis, Loew. 



43. Arista of male antennae enlarged at tip ; middle tibia; in 



both sexes with black tip liastatus, Loew. 



Arista plain 44 



44. Middle tarsi entirely black : in the male the first joint later- 



ally feathered plumipes, Scopoli. 



Middle tarsi more or less yellow at base, not feathered 45 



45. Hind tibiae distinctly black at tip 46 



Hind tibia; not or scarcely infuscated at tip 58 



46. Antennse black, first joint sometimes yellow below 49 



First joint entirely yellow 47 



47. Antennae yellow, tip of third joint blackened 48 



Third joint and part of second black. . . .flagellitenens, Wheeler. 



48. Male fore tibiae incrassated at tip . Jie/ishawi, Wheeler. 



