FAMILY TRUPAXEID.T: — THE FRUIT FLIES 287 



KEY TO GENERA* 



1. Scutellum with six strong-, regularly placed bristles 2 



Scutellum with not more than two pairs of bristles or they are weak 



and not regularly placed, the apical pair being very widely separated 4 



2. Front more than half as wide as the head (1) Xenochaeta Snow 



Front decidedly less than half as wide as the head 3 



3. Triangle of the anal cell longer than the petiole (46, 70). 



Blepharoneura Loew 

 Ti'iangle of the anal cell shorter than the petiole (2, 69).. Hexachaeta Loew 



4. Scutellum with two pairs of bristles, the apical pair strong 5 



Scutellum with one pair of strong bristles or if with two pairs the 



apical pair is absent and there are two pairs on the basal half 36 



5. Fourth vein not or scarcely curved forward at the apex 6 



Fourth vein strongly curved forward at the apex (3, 9). 



Anastrepha Schiner 



6. Anterior pair of dorsocentrals situated far in front of a line drawn 



between the anterior pair of supra-alars 24 



Anterior dorsocentrals situated at most slightly in front of such a line, 

 usually behind 7 



7. Proboscis very long and slender, geniculate; (Asimoneura Czerny; 



Rhynencina Johnson; Aleomyia Phillips) (4, 42) Euribia Latreille 



Proboscis short and thick, not geniculate in the middle 8 



8. Arista short plumose or bare 9 



Arista long plumose Molynocoelia Giglio-Tos 



9. Scutellum not mostly shining black or the apex yellow or sulcate 10 



Scutellum mostly shining black, the base narrowly yellow, the apex 



never sulcate (29, 66) Ceratitis McLeay 



10. Acrostical and dorsocentral bristles in an almost transverse row (5, 60). 



fAcidia Desvoidy 

 Dorsocentrals placed far in front of the acrosticals so that there appear 

 to be two pairs of dorsocentrals 11 



11. Notopleura with several setulaj near the posterior bristle (24, 63). 



Epochra Loew 

 Notopleura bare 12 



12. Cheeks at most slightly more than one-fourth as wide as the eye- 



height, if doubtful the scutellum is sulcate 13 



Cheeks at least two-fifths as wide as the eye-height; oral margin not 

 strongly produced 22 



13. Stigmatal cell long and narrow, four times as long as wide; wings 



reticulate (21, 36) Icterica Lcew 



Stigmatal cell shorter and broader, not over three times as long as 

 wide; wings not reticulate 14 



* Baryplcgma Wuli) is omitted. 



t Trypeta versatilis Curian is a true Acidia while Acidia fratria Loew is a true Trypeta. 



