Dec, I913-] MeLANDER: SYNOPSIS OF DiPTERA. 285 



10. Antennae more or less projecting, not reaching the oral margin; base of 



anal vein present, but rudimentary 1 1. 



Antennas decumbent, the third joint twice as long as broad, reaching the 

 oral margin ; anal vein wanting ; foremost f ronto-orbital reduced in 

 size ; face narrow, its sides parallel ; arista pubescent ; the second 

 antennal joint tipped with a short projecting bristle. (Europe, North 

 America.) Tryptochata Rondani. 



11. Arista plumose, the hairs longer above, third antennal joint one and one 



half times as long as broad; the second joint tipped with a strong 

 projecting bristle; hindmost f ronto-orbital reduced in size; face as 

 broad as either eye, widest at level of the vibrissae. (Europe, North 



America.) Diastata Meigen, 



Arista pubescent; the third antennal joint short, oval; the second joint 

 without projecting bristle; fronto-orbitals of male as in Diastata, of 

 female as in Tryptochccta. (Europe.) Euthychata Loew. 



12. Oral vibrissae not differentiated; eyes reniform, approaching below so as 



to narrow the face ; arista long and loosely plumose ; wings more or 



less pictured ; four scutellars 13. 



Oral vibrissae present ; eyes rounded, face not shield-shaped ; arista short- 

 plumose or pubescent; third antennal joint rounded; usually but two 

 strong scutellar bristles 15. 



13. Wings fasciate, only the base of the auxiliary vein present, second basal 



and anal cells relatively large; second antennal joint rather broad, 



the third joint somewhat pointed 14. 



Wings nearly hyaline, the broad marginal cell more or less brownish ; 

 second basal and anal cells wanting ; third and fourth veins converg- 

 ing ; second and third sections of the costa equal ; third antennal 

 joint broadly oval. (South Asia.) (Tijds. ent., LIV, 423, 1911.) 



Amphoroneura deMeijere. 



14. Face hollowed out in the middle and elevated into a low ridge on each 



side and around the lower end; one pair of fronto-orbitals; two ver- 

 tical, one ocellar and one postvertical. (North America.) 



Scutops Coquillett. 

 Center of face longitudinally convex and slightly raised above the facial 

 orbits ; two pairs of fronto-orbitals, forming a transverse row, one 

 vertical, no ocellar, no postverticals. (North America.) 



Cyamops new genus. 



15. Wings six times as long as broad, the hind margin broadly and strongly 



excised, leaving the discal cell unusually narrow; occiput convex. 



(North America.) Miitiloptera Coquillett. 



Wings not unusually narrow, the hind margin not excised ; occiput con- 

 cave ; front femora usually with a thorn beneath 16. 



16. Wings pictured, the second vein arching forward close to the costa, the 



anal angle wanting ; two fronto-orbitals ; cheeks one tenth the eye- 

 height; ocellar triangle large and shining. (North America.) 



Ischnomyia Loew. 



