242 



LEPTID^ 



18 (19) Frons and sidemargins of the face in both sexes hairy (fig. 171). 



3. Atherix. 





Fig. ni.— Atherix Ibis S. X 18. 



Fia. 172. — Atriehops crassipcs S. x 20. 



19 (18) Frons of the male (almost) and sidemargins of the face in both 



sexes bare (fig. 172). 4. Atrichops. 



20 (15) Hind tibiae with only one spur (and even that sometimes 



indistinct). 



Eye-facets of the male usually horizontally divided into large 

 facets above and small facets below (but not in Stpnphoromyia 

 immacvlata). 



CHRYSOPILINiE (p. 295). 



21 (30) Wings with five posterior cells (fig. 173) ; discal cell present. 



22 (23) Third antennal joint reniform; arista apparently dorsal (fig. 174). 



5. Symphoromvia. 



Fig. 174. — Symphoromyia 

 immaeulata <j. x 43. 



Fig. 173. — Symphoromyia immaeulata $. x 17. 



23 (22) Third antennal joint small, ovate, bulbose, or conical, but never 



reniform. 



24 (25) Third antennal joint bulbose and bearing a long thin terminal 



arista. 



Body bearing golden scales. 



6. Chrysopilus. 



25 (24) Third antennal joint (even if bulbose) bearing a short and thick 



arista or style. 



Body not bearing golden scales. 



