314 MEMOIRS OF THE CARNEGIE MUSEUM 



7. Hiiul coxa> not small, the posterior margin at base hairy ; abdomen not rotund 8 



Hind coxa' small, subovate, the i)Osterior margin at base not hairy ; abdomen rotund ; head large, 



wider than the thorax Dirhicnus Thomson (type D. subcaeruleva Thorns.). 



8. AntenniB with three ring-joints 9 



Antennas with two ring-joints. 



Collar not distinctlj' separated ; flagellum filiform, the pedicel obconical, shorter than the first 

 joint of the funicle ; metathorax not short, punctate, with a median carina, the spiracles oval ; 

 abdomen elongate, longer than the thorax . . . .Stinoplus Thom.son (type E. militaris Thorns.). 

 Collar naiTowed medially ; flagellum filiform, the pedicel small, a little longer than thick ; meta- 

 thorax without a median carina, the spiracle oval ; abdomen elongate, pointed toward apex, 



and longer than the head and thorax Spintherus Thomson (type S. obscuriis Thoms.). 



9 I'ronotum as wide as the mesonotum, distinctly separated, and with the anterior margin acute ; meta- 

 thorax short, punctate, with a small globose neck and without a median or transverse carina, the 

 spiracles subreniform ; flagellum subfiliform, hardly thickened towards apex ; abdomen ovate, 

 hardly longer than the thorax ; marginal vein not longer than the stigmal vein. 



Bruchobius Ashmead, g. nov. (type B. laticeps Ashm.). 

 Pronotum narrower than the mtsonotum, the anterior margin not acute ; metathorax with a subglo- 

 bose neck, punctate, and with usually median and transverse carinse or at least with one or the 

 other present, the spiracles oval or ellipsoidal, not reniform ; flagellum filiform or subfiliform. 



Metanotum with a transverse carina near the base^ the median carina wholly absent ; mar- 

 ginal vein long, a little more than twice the length of the stigmal vein. 



Lophocomodia Ashmead (type L. americana Ashm.). 

 Metanotum with transverse and median carin:e present ; marginal ^ein not long, not or hardly 



longer than the stigmal vein Psilocera Walker. 



= Eupsilocera Westwood = Dichalysis Forster (type P. obscura Walk.). 



10. Flagellum with three ring-joints ; scutellum normal ; metathorax with the median and transverse car- 



inte usually present although sometimes the transverse fold is vaguely defined or absent, the spiracle 

 oval ; abdomen subcomprcsscd beneath toward apex, the hypopygium prominent. 



Metapon Walker (type M. atrum Walker). 

 Flagellum with two ring-joints ; fcutellum hardly elevated and produced into a blunt conical spine 

 posteriorly ; metathorax with median and transverse carinre present, the spiracles large, elongate 

 oval ; abdomen compressed, the hypopygium prominent, plowshare-shaped. 



Acanthometapon Ashmead, g. nov. (type A. clniucornia Ashm.). 



11. Head triangular, narrowed towards the mouth ; eyes large, rounded, or oblong-oval, convex ; prester- 



num large ; mesosternal furrows distinct ; metathoracic spiracles rounded, remote from the post- 



scutellum 12 



Head not triangular, viewed from in front more rounded, usually very slightly wider than long ; eyes 

 oblong-oval or oval ; presternum not large ; mesosternal furrow not distinct ; vertex broad ; meta- 

 thoracic spiracles not rounded 14 



12. Vertex not acute medially 13 



Vertex broad, acute medially ; antennie long, the flagellum filiform, the funicle joints long. 



Etroxys Westwood. 

 1.3. Antennie subclavate ; metathoracic spiracles small, round Holcaeus Thomson. 



Antennaj filiform ; metathoracic .spiracles oval, or not round Cricellius Thomson. 



14. Tip of antennie not white l-'> 



Tip of antennie white Chrysoglyphe Ashmead. 



