ART. 15". REVISION OF SUBFAMILY PLATYGASTERINAE FOUTS. 47 



16. PLATYGASTER HERRICKII Packard. 



Plalygaster herrickii Packard, Third Rep. U. S. Ent. Comm., p. 220. — Riley, 

 Proc. U. S. Nat. Mus., vol. 8, p. 420, pi. 23, fig. 6, male.— Ashmead, Can. 

 Ent., vol. 19, 1887, p. 132.— Cresson, Syn. of Hym., 1887, p. 250.— Ashmead, 

 Bull. 45, U. S. Nat. Mus., 1893, p. 324.— Bbues. Bull. 22, Conn. Geol. Nat. 

 Hist. Surv., 1916 (1917), p. 540. 



Aneurhy7ichus aneurusFROVA^cnER, Addid, Fauna Ent. Can., 1887, p. 176, male. 



Female. — Length 2 mm. Body moderately robust, beautiful in 

 outline and sculpture; head as wide as the thorax, about twice as 

 wide as long, flattened in front, slightly excavated posteriorly; cheeks 

 very full, convex, swelling out from the posterior margin of the eyes; 

 head shining, shagreened; frons medially polished; area just above 

 the insertion of the antennae covered by quite a number of large 

 transverse carinae, the carinae not quite reaching to the eye margin; 

 ocelli triangularly situated, the lateral ones elliptical, a trifle nearer 

 to the eye margin than to the anterior ocellus; scape slender, nearly 

 as long as the head is high, two-thirds as long as the flagellum ; pedi- 

 cel a little more than twice as long as wide, as wide as joint four, 

 nearly as long as joints three and four united, narrowed basally, third 

 joint slightly longer than wide, half as long as the pedicel; joint five 

 about as wide and as long as the fourth, as long but slightly narrowe, 

 than the sixth; joints six through nine subequal in length and width, 

 a little longer than wide; joint ten a little longer than the ninth, 

 distinctly narrower than the ninth, twice as long as v/ide; it is 

 rounded above at the apex, acute below; thoracic ratio: length 38 

 (0.844 mm.), width 25, height 28; dorsum of thorax shagreenedr 

 finely scaly (except the lateral lobes of the mesonotum which are 

 polished on the sides near the tegulae) ; notauli complete, deeply 

 indicated; median lobe of the mesonotum strongly narrowed poster- 

 iorly, truncated just in front of the scutellum, its free end reaching 

 over the scutellar fovea; pronotum mostly polished, with a narrow 

 band of shagreening medially; mesepisternum polished, with the 

 dorsal suture rather deep, A-shaped; sterno-pleural suture distinct; 

 scutellum circular seen from above, evenly convex, finely scaly, 

 sparsely pubescent, with the lateral margins rather low; propodeum 

 laterally and metapleurum densely covered with long brownish hairs; 

 tegulae polished, ferruginous apically; abdomen elliptical, 1.10 mm. 

 long, as wide as the thorax, twice as long as wide, convex above and 

 below; first tergite not quite twice as wide as long, pubescent laterally 

 and along its posterior margin, its anterior edge raised as a narrow 

 transverse rim; median area of first tergite a little longer than wide, 

 with an obsolescent median carina; first sternite densely pubescent, 

 the hairs similar to those on the dorsum of the same segment and on 

 the sides of the propodeum; second tergite polished, about one-fifth 

 of its own length longer than wide, twice as wide at the apex as at 

 the base, the sides slightly curved; basal foveae deep and broad but 



