ALDKICH : IJOI.ICHOPUS AND H VGROCELEUTHUS. 3 



Hind femora of male ciliated 15 



15. The black color at tip of hind tibiie rather extended and not 



sharply limited albiciliatus, Loew. 



The black color but little extended and sharply limited. . . . 



xanthocnemus, Loew. 



SECTION B : FEMORA VELLOW. 



Group I : cilia of inferior orbit black. 



16. Cilia of inferior orbit black 17 



Cilia of inferior orbit pale 21 



17. Fore coxae blackish pachycnemus, Loew. 



Fore coxae yellow 18 



18. Cilia of tegulae pale mcongruus, Wheeler. 



Cilia of tegulae black 19 



19. First two joints of antenna; yellow dorycerus, Loew 



Whole antennae black brevipennis, Meigen. 



Group 2: cilia of inferior orbit pale. 

 Sub-group a: cilia of tegulte pale. 



21. Tegulae with pale cilia 22 



Tegulae with black cilia 36 



22. Antennae black, first joint sometimes partly yellowish-red. • • .23 

 Antenna; chiefly or wholly yellowish-red 34 



23. Fore coxcC dark at base, beyond the middle. . lougimaiuis, Loew. 

 Fore coxce pale 24 



24. Tip of hind tibiae distinctly black 25 



Tip of hind tibia; not or but slightly infuscated 27 



25. Male fore tarsi enlarged albicoxa, n. sp. 



Male fore tarsi plain 26 



26. Fore tarsi ferruginous-brownish only breviinanus, Lotw. 



Fore tarsi blackened from tip of first joint iocius, Loew. 



27. Hind tarsi entirely black 28 



Hind tarsi to a considerable extent pale 32 



28. Hind femora of male not ciliated iiudus, Loew. 



Hind femora of male ciliated 29 



29. The enlarged last joint of the male fore tarsi on the outside 



with a white reflection pakestricus, Loew. 



The same without a white reflection • • • 3° 



3:. Hind femora of male very densely ciliated s'plendidus, Loew. 



Hind femora of the male sparsely ciliated 31 



31. Hind tibite not infuscated at the tip ; fourth joint of male 



fore tarsi somewhat broader than the preceding 



splendidulus, Loew. 



