28 Familiks and Gkneua of 



36. First posterior cell narrowed or closed 37 



First posterior cell wide open 39 



37. Three subniarginal cells, i. e. the upper branch of the third vein 



is connected with the second by a short vein. Pogonosoma 

 Two submarginal cells. ....... 38 



38. Hind femora of nearly equal thickness throughout; antenna' 



with a distinct terminal style; very large, robust, thickly pi- 

 lose species Hyperechia 



Hind femora thickened toward the end ; antennae without termi- 

 nal style ; more elongate, less pilose species. Andkenosoma 



39. Thorax and abdomen nearly or quite bare ; hind femora with 



spinous tubercles below. ..... Lamfkia 



Thorax and abdomen pilose, larger species. ... 40 



40. Densely pilose species; the abdomen short, broad, usually broader 



beyond the middle, in the male sometimes more elongate ; 

 proboscis thick. ...... Dasyllis 



Less pilose, more elongate species ; proboscis more elongate and 

 slender. ........ Laphria 



41. Bristle of antenna; plumose Ommatius 



Bristle not plumose 42 



42. The third vein (posterior branch) curved forwards to meet the 



costa ; two submarginal cells, rarely three. ... 43 



The third vein curved backward to meet the margin of the wing 



at or beyond the tip. 44 



43. Oviduct cylindrical, with a terminal circlet of spines. 



Proctacanthus 

 Oviduct laterally flattened, without circlet or spines. Erax 



44. Two submarginal cells.* (Asilus sens, lat.) . . .46 

 Three submarginal cells. 45 



46. Abdomen shorter than the wings ; body thickly pilose, claws 

 obtuse. Mai-u>phora 



Abdomen longer than the wings; body thinly pilose. Promachijs 

 46. Oviduct ( 9 ) laterally compressed 47 



Oviduct not laterally compressed, conical 62 



* The remainder of this table is a translation from Loew, Diptf. Sud. 

 Afrikas,p. 142. 



