ART. 15». REVISION OF SUBFAMILY PLATYGASTEEINAE — FOUTS. 69 



third as long as the second : six very wide, several times as wide as 

 long, rounded apically; wings hyaline, extending the length of the 

 second tergite past the apex of the abdomen. Black; legs and anten- 

 nae dark brown; tarsi lighter. 



Type locality. — Pariah, Utah. 



TVpe.— Cat. No. 2291, U.S.N.M. Female selected as type. Male 

 as allotype. 



Redescribed from the type female. Ashmead mentioned a male 

 in his original description. I have examined his male type and find 

 it to belong to the genus L^ptacis. It remains undescribed. 



The type reared in July, 1881, from a Cecidomyid gall on Artimesia 

 3-dentata. 



34. PLATYGASTER STRIATICEPS ( Ashmead). 



Polygnotus striaticeps Asu-MEAD, Bull. 45, U. S. Nat. Mus., 1893. p. 308. — Brues, 

 Bull. 22, Coun. Geol. Nat. Hist. Surv., 1916 (1917), p. 537. 



Female. — Length 1 mm. Head twice as long as wide, oblong, as 

 wide as the thorax, slightly emarginate behind, subconvex in front; 

 cheeks convex, striate above, shagreened below; occiput and vertex 

 strongly arcuately striate, the latter rounded above, projecting slightly 

 over the middle of the eyes in a broadly rounded lobe; interocellar 

 area transversely striate; frons aciculate, obliquely on the sides and 

 transversely below; pedicel twice as long as wide, as long as Joints 

 three and four united, a little wider than four; joint tliree as wide as 

 long, hardly narrower than four; four a little longer than wide, 

 slightly longer than five, which is as wide as long; six much wider, 

 as long as wide ; joints seven to nine longer than wide, somewhat longer 

 than six ; thorax two-thirds as wide as long, convex above, as high as 

 wide; pronotum faintly aciculate laterally; mesonotum shagreened on 

 anterior half, polished posteriorly; notauli distinct on basal two-thirds, 

 the median lobe narrowly rounded posteriorly; scutellum a little 

 wider than long, convex, polished, sparsely pubescent; abdomen 

 broadly elliptical, as wide as the thorax, a little less than twice as 

 long as wide; first tergite regularly rounded above, with many lon- 

 gitudial carinae, not angulate on the sides; second tergite as long as 

 wide, strongly narrowed anteriorly, the sides straight: basal foveae 

 short, not reaching to the middle of the segment, striae reaching past 

 the middle of the segment; between the foveae the anterior edge is 

 raised and from it extend several short carinae: tergites three to six 

 unsculptured, united half as long as the second; six wider than long, 

 rounded apically; wings hyaline, extending the length of the last four 

 segments past the apex of the abdomen. Body dark reddish brown 

 (except the tarsi which are paler, dull whitish in color). 



Male. — Length 1.10 mm. Pedicel a little longer than wide, as 

 long and as wide as joint four: joint three as wide as long, two-thirds 



