FAMILY TKITANEID.E THE FRUIT FLIES 291 



Fourth vein ending behind the tip of the wing, the wing-apex near the 

 third vein; wings rather pointed (8, 50, 51) Straussia Desvoidy 



24. Anterior ami posterior crossveins separated from each other by much 



less than half the length of the anterior crossvein; posterior cross- 

 vein very strongly recurrent (13) Polymorphomyia Snow 



Crossveins much less approximate; posterior crossvein not strongly 

 recurrent 25 



25. Scuttellum strongly shining black, swollen and hemispherical 26 



Scutellum more or less dull, more or less flattened or at most motler- 



ately convex 27 



26. Parafacials bare (44, 79) Procecidochares Hendel 



Parafacials with a row of rather long pale hairs (61). . .Callachna Aldrich 



27. Notopleura cinereous pollinose 28 



Notopleura bare or rather thinly brownish pollinose 31 



28. Anal cell drawn out posteriorly into an elongate triangle 29 



Anal cell not drawn out apically, or with a short, transverse triangle 



(Euaresta Loew; Urophora Loew) (11, 12, 64) Tephritis Latreille 



29. Antennal pits not deep, not separated and strongly marked 30 



Antennal pits deep, separated and strongly defined (41, 48). 



'^Polionota Wulp 



30. Face and front rather strongly narrowed to the antennae; oral margin 



with hair only on the anterior half (17, 54) fTetreuaresta Hendel 



Face and front not strongly narrowed to the antennae; oral margin with 

 bristles almost to the oral angles (45, 59) Acrotaenia Loew 



31. Anterior crossvein situated not more than its own length from the 



posterior, both strongly oblique (32, 72) Tomoplagia Coquillett 



Anterior crossvein situated more than its length from the posterior, 

 both never strongly oblique 32 



32. Stigmal cell scarcely longer than wide (25, 38) Stenopa Loew 



Stigmal cell usually twice as long as wide, always much longer 33 



33. Front with two pairs of black reclinate bristles, none converging (35, 



73) Paracanfha Coquillett 



Front with three pairs of convergent f rentals 34 



34. Costal spines short and not very conspicuous 35 



Costal spines rather long and conspicuous (15, 33) JEutreta Loew 



35. Wings with crossbands (26) Orellia Desvoidy 



Wings with a brown pattern containing hyaline indentations and spots 



(22) Eucosmoptera Phillips 



* The sinirle specimen I have before me is loaned by Dr. Aldrich and is determined as 

 mucida Giplio-Tos. The fijrure by Giprlio-Tos shows the anterior crossvein in the hyaline costal 

 trianjtle and much farther from the posterior crossvein than I find it. The species I have 

 illustrated may not be mucida, and may even belong to a different genus, depending upon the 

 shape of the head. Mr. Van der Wulp's drawing is poor in regard to the anal cell. 



t This genus is very doubtfully distinct from Acrotjenia. 



t Curran, 1932, Amer. Mus. Novit. No. 556. 



