FAMILY EMPID-E — THE DAXCE FLIES 



211 



31. Metapleura with hairs or bristles in front of the halteres 35 



Metapleura bare 32 



32. Auxiliary vein ending- in the costa 33 



Auxiliary vein obsolete apically (2, 9) Toreus Melander 



33. Auxiliary vein bending apically to meet the costa; anal angle promi- 



nent (27, 39) Hilara Meigen 



Auxiliary vein almost straight, the anal angle broadly rounded 34 



34. Thoracic bristles strong; antennae below the middle of the head (29). 



Philetus Melander 

 Thoracic bristles almost absent; antennae at the midtlle of the head 

 (3, 11) Hesperempis Melander 



35. Style three times the length of the third antennal segment. 



Opeatocerata Melander 

 Style not longer than the thii'd segment 36 



36. First antennal segment nearly or quite as long as the third, the an- 



tennaj situated high upon the head 37 



First segment much shorter than the third, situated at most a little 

 above the middle of the head 38 



Empida? IV. — 37, Microphorus vclutinus; 

 41, Bicellaria; 42, Proclinopyga aniplcctans. 



1^, Iteaphila macquarti; 39, Hilara; 40, Erapis; 



