442 PROCEEDINOS OF THE NATIONAL MUSEUM. vol.46. 



Four tag-mounted specimens from the type-locality reared by 

 G. G. Ainslie from Jassid eggs and recorded under Webster No. 

 8381 C, Bureau of Entomology, United States Department of 

 Agriculture. 



Superfamily PROCTOTRYPOIDEA. 

 FamUy SCELIONID.E. 



SuTafainily XELENOMIIN^E. 

 EUMICROSOMA, new genus. 



Head transverse, as wide as the thorax; occiput triangularly con- 

 cave, lateral ocelli close to but not touching the eye-margin : from in 

 front the head is distinctly broader than long dorso-ventrally, the 

 face broad and nearly flat; antennae inserted at the mouth with a 

 small tootlilike process separating them at the bases, 11-jointed and 

 distinctly clavate in the female, in the male 12-jointed and submonili- 

 form. Thorax widest at the shoulders, tapering gradually poste- 

 riorly; prothorax concealed from above; mesoscutum rounded in 

 front, only a little convex, and without parapsidal grooves; mesoscu- 

 tellum flat, transverse; postscutellum unarmed, flat, separated from 

 the scutellum by a curved row of punctures; propodeum short, 

 truncate beliind, with a median longitudinal carina and a transverse 

 carina bounding the truncature above, laterally on the dorsum deeply 

 striate, medially on either side of the median carina nearly smooth; 

 lateral angles of the propodeum rounded. Forewings narrow, with 

 marginal cilia longer than the Avidth of the wing; marginal vein close 

 to the costa, and nearly as long as the submarginal, extending beyond 

 the middle of the wings; stigmal vein short, appearing as a continua- 

 tion of the marginal and only very slightly oblique, its apex scarcely 

 thickened; postmarginal obsolete; discal cilia of the forewings 

 u-regularly placed. Posterior wings Unear, with long marginal cilia. 

 Abdomen elliptical, not wider than the thorax, flattened above, the 

 lateral margins not acute; first segment broader than long; second 

 segment very long, extending almost to the apex of the abdomen, its 

 apex rounded; ovipositor concealed or exserted not more than one- 

 fourth the length of the abdomen. 



Type. — Eumicrosoma henejica, new species. 



Tliis genus runs to Typhodytes in J. J. Keiffer's key to the Tele- 

 nominse,^ but is readily separated from that genus by antennal and 

 venational characters. 



EUMICROSOMA BENEFICA, new spedes. 



Plate 39. fig. 3. 



Female. — ^Length 0.75 mm. Head from above more than twice as 

 broad as long antero-posteriorly, the vertex faintly sculptured, face 



I Wytsman's Genera Insectorum, Fascicule 80 B, 1900, p. 105. 



