18 Orthorrhapha brachyceia. 



postical vein and closes the discai cell below, there is thus no cross- 

 vein between the discai cell and the postical vein ; four posterior cells. 

 Alula distinct, pointed; squamula alaris small, no squamula thoracalis; 

 wing membrane not transversely corrugated. 



Only one genus I . Pachygaster. 



:2. Clitellariinae. 

 Sculelluni unanned or with two spines; abdomen consisting of 

 five to six segments. From the discai cell rise fourveins, the fourth 

 is the anterior branch of the postical vein, it lies close to the discai 

 cell, there is thus no cross-vein between the discai cell and the postical 

 vein; five posterior celis. Alula distinct, somewhat pointed; squamula 

 alaris rather small, haired at the margin, squamula thoracalis distinct 

 but narrow, long haired at the margin. Wing membrane somewhat 

 {Oxycerd), not transversely corrugated (Neinotelus). 



1. Scutellum unarmed 2. Nemotebts. 



— Scutellum with two spines 3. Oxijcera. 



3. Stratiomyiinae. 

 Scutellum with two spines; abdomen consisting of five segments. 

 From the discai and second basal cell rise four veins, (of which the 

 first and third may be more or less rudimentary or the third wanting) 

 the fourth is the anterior branch of the postical vein; a cross-vein 

 between the discai cell and the postical vein ; five posterior celis (sonie 

 of which may be more or less fused). Alula well developed ; squamula 

 alaris distinct, haired at the margin, squamula thoracalis ralher large, 

 with long hairs, sometimes curved at the ends, in the margin. Wing 

 membrane transversely corrugated. 



1. First joint of antennæ about four times as long as the 



second 4. Stratiomyia. 



— First joint of antennæ as long as, or at most twice as 



long as the second 2. 



2. Radial vein present, cubital vein generally forked o. Odontomyia. 



— Radial vein wanting, cubital vein short, not forked ... 6. Hoplodonta. 



4. Sarginae. 



Scutellum unarmed; abdomen consisting of five segments. From 

 the discai and second basal cell rise four veins, the fourth being the 

 anterior branch of the postical vein ; a cross-vein between the discai 

 cell and the postical vein ; five posterior cells. Alula distinct, triangular, 

 pointed; squamula alaris small, haired at the margin, squamula thoracalis 

 narrow, somewat lingulate or slighty rounded, with long hairs, curved 

 at the ends, at the margin. Wing membrane transversely corrugated. 



