334 PROCEEDINGS OF THE NATIONAL MUSEUM. 



TABLE OF GENERA, 



Males - 30 



Females. 



Mandibles shorter, with less acute, equal or nearlj^ equal teeth; labrum not con- 

 spicuous; frons frequently, but not always, with a series 

 of large, thimble-like punctures; wings frequently ornate 

 or dusky, although often hyaline; scrobes usually semi- 

 circular 5 



Mandibles rather long, with acute teeth, the apical tooth usually the longest 

 ' and more acute than the two inner (rarely with the two 



outer longer than the inner) ; labrum conspicuous; frons 

 very closely punctate or finely coriaceous, the thimble- 

 like punctures absent, or the punctures smaller and 

 sparsely scattered over the surface; wings not ornate, and 

 usually with a very short or punctiform marginal vein, 

 the hind wings usually with a long costal cell extending 

 to the booklets; abdomen usually more or less compressed 

 - toward apex, the ventral A^alve extending as far as the 

 anus but not plowshare shaped; head as viewed from in 

 front usually somewhat long, often much longer than 

 wide, or subtriangular, the scrobes forming a triangle. 

 Marginal vein distiuct, at least twice as long as thick, but usually longer, the 



postmarginal vein longer than the stigmal 4 



Marginal vein xiunctiform, not or scarcely longer than thick (very rarely 

 twice as long as thick), the j)ostmarginal vein not at all 

 or only slightly developed, rarely as long as the stigmal; 

 the stigmal Aein comparatively long, always more than 

 twice as long as the marginal, or much longer; body 



metallic or lustrous 2 



2. Head, viewed fro)n iu front, not longer than wide, the cheeks, or malar space, 



not especially long 3 



Head, viewed from in front, long, subtriangular, much longer than wide, the 

 cheeks or malar space long. 

 Front wings not ciliate; antenufe very long and slender, the flagellar joints 

 all very long and cylindrical, the sixth being at least four 

 times as long as thick, the preceding still longer. 



(26) PsilopJirys Mayr. 

 Front wings ciliate. 



Pedicel fully three times or more longer than thick at apex. 



AntenniB like Fsilophrys, very long and slender, the scape very long, 

 slender; cheeks not quite the length of the eyes; oviposi- 

 tor very long (27) Parapsilophrys Howard. 



Flagellum long and slender, fully or about twice as long as the 

 scape, the funicle joints all long and cylindrical, the club 

 not or hardly thicker than the last joint of the funicle. 



(28) Hotlwrax Mayr. 

 Flagellum scarcely one and a half times as long as the scape, the 

 ^ funicle joints gradually decreasing in length, but all not 



or very little longer thau thick, usually transverse; head 

 and mesonotum finely closely punctate or shagreened; 

 frons not especially broad, club much thickened, obliquely 

 truncate from beneath; eyes bare. 



(29) Litomastix Thomson. 



Flagellum not long, not much longer than the scape, the funicle 



joints, except the first, not longer than thick, the club 



