ART. lo". REVISION OF SUBFAMILY PLATYGASTERINAE FOUTS. 37 



antennae rather stout; scape long, curved and narrowed basally, 

 slightly curved and widened apically, about as long as the following six 

 joints united; pedicel about twice as long as wide, it and the three fol- 

 lowing joints subequal in width; third joint two-thirds the length of the 

 second, as long as the fourth; fifth spherical; sixth as wide at the apex 

 as long, slightly narrowed proximally, as wide as the fifth; seventh, 

 eighth, and ninth joints a little wider than long, somewhat longer 

 than the sixth; last joint nearly as long as the pedicel, blunt at the 

 tip and distinctly less than twice as long as wide; thorax shaped as 

 in melliscapus ; notauli sharply indicated but not attaining the ante- 

 rior margin of the mesonotum; median lobe of mesonotum finely sha- 

 greened (except in the region of the apex where it projects in a rather 

 broad tongue-like plate over the scutellar fovea) ; lateral lobes of the 

 mesonotum finely shagreened (except in the middle where they are 

 unsculptured) ; scutellum convex, not very much elevated, somewhat 

 triangular, slightly broadened at the base, but not depressed laterally 

 as in some forms of Leptacis, rather densely covered with decumbent 

 whitish hairs; metaplcurae and sides of propodeum covered withpubes- 

 cense similar to that on the scutellum; abdomen spatulate, as long as 

 the thorax and about as wide at the apex of the second tergite as 

 the thorax; first and second tergites without pubescence; first pol- 

 ished, the dorso-lateral carinae not very prominent and the central 

 area only a little longer than wide; second tergite a little wider at the 

 apex than long, much narrower anteriorly; basal foveae distinct, not 

 striate; third, fourth, and fifth tergites much wider than long, sub- 

 equal in length, becoming rapidly narrower posteriorly; sixth tergite 

 wider than long, subacute at apex; wings extending slightly beyond 

 the apex of the abdomen, greyish brown, pubescent. Shining black; 

 legs (except hind coxae) and antennae (except last five joints), rufous; 

 hind femora brownish; hind coxae and last five antennal joints piceous. 



Type locality. — Arlington, Virginia. 



Type.—Csit. No. 24597, U.S.N.M. 



Redcscribed from the type specimen. The species is rather peculiar 

 with its varicolored antennae and slightly broadened scutellum but 

 nevertheless it is a true Platygaster and illustrates one of the many 

 variations from the typical form of the genus. 



8. PLATYGASTER CARYAE Ashmead. 



Platygaster caryae Ashmead, Bull. 45. U. S. Nat. Mus., 1893, p. 323. — Brueb, 

 Bull. 22, Conn. Geol. Nat. Hist. Surv. 1916., ( 1917), p. 540. 



Female. — Length 2.30 mm. Head twice as wide as long, wider 

 than the thorax,, flattened in front, emarginate behind; cheeks flat- 

 tened, coarsely shagreened; occiput rugose, with several longitudinal 

 carinae medially; vertex subacute, strongly shagreened, striate medi- 

 ally; interocellar space punctate or granular; face more or less shin- 



