314 MEMOIES OF THE CARTSTEGIE MUSEUM 



7. Hind coxse not small, the posterior margin at base hairy ; abdomen not rotund 8 



Hind coxfB small, subovate, the posterior margin at base not hairy ; abdomen rotund ; bead large, 



wider than the thorax Dirhicnus Thomson (type D. subcceruleus Thoms.). 



8. Antennae with three ring-joints 9 



Antennte with tivo ring-joints. 



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

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

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



Collar narrowed 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. obscurns Thoms.). 



9. Pronotum as wide as the mesonotum, distinctly separated, and with the auterior 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.). 

 Pronotiim narrower than the mesonotum, 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. 



Metauotum 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 carinse present ; marginal vein not long, not or hardly 



longer than the stigmal vein Psilocera- Walker. 



= Evpsilocera Westwood = Dichalysis Forster (type P. ohscura Walk.). 



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



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

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



Metapon Walker (type M. atrum Walker). 

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

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

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



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



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



num large ; mesosternal furrows distinct ; metathoracic si^iracles 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 ; mesostei*nal furrow not distinct ; vertex broad ; meta- 

 thoracic spiracles not rounded 14 



1 2 . Vertex not acute medially 13 



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



Etroxys Westwood. 

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



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



14. Tip of antennse not white 15 



Tip of antennaj white Chrysoglyphe Ashmead. 



