486 



BOMBYLIN.E 



23 (24) Eadial vein very much looped up at its end (fig. 283). 



Alula small and indented off from the hind angle of the wing. 



Legnotomyia. 



Fig. "JSS. — Legnotomyia trichorrhixa Lie. (After Becker) 



24 (23) Eadial vein only moderately curved up at its end (fig. 284). 



Alula large and hardly indented off from the hind angle of the wing. 



PSIATHOLASIUS. 



25 (22) Anal cell closed. T/tcrcvrc-shaped flies. Third antennal joint 



with a terminal style (sometimes minute). 



26 (27) Discal cell not widened towards its end (fig. 281). 1. Phthiria. 



27 (26) Discal cell widened towards its end. Hetekotropus. 



28 (21) First antennal joint much longer than the second (fig. 285). 



Anal cell open. 



Fig. 284. — Psiatholasinn hombylijormis <$ • (After Becker) 



Fig. 285. — Bonibylius mnjor d. x 23. 



29 (32) Upper basal cell only as long as ihe second ; first posterior cell 



closed (fig. 286). 



Legs usually with spicules on the femora. 



30 (31) Underside of the head moderately pilose, and hence its different 



Fio. '2S6.—Systcechus snlphureus. x 12. 



parts (including the base of the antennae, the oral edge, etc.) 

 easily perceptible. Systcechus. 



