ART. 15«. EEVISION OF SUBFAMILY PLATYGASTERINAE FOUTS. 127 



Redescribed from the type series, four females, in the National 

 Museum. No males were found in the type material and since this 

 sex was not described by Ashmead, but only listed, I do not take the 

 trouble to mention it above. It is probable that the specimen from 

 Washington, if there was any, was the male type. 



The species is variable as the description shows. The sculpture of 

 the face varies and the relative length of the abdomen changes as 

 the posterior segments are extended or retracted. The color va- 

 ries somewhat also. One specimen has the legs mostly golden-yellow 

 with the hind legs infuscated in part. 



14. LEPTACIS LONGIVENTRIS Ashmead. 



Plate 1, fig. 10. 

 Leptacis longtventris Ashmead, Bull. 45, U. S. Nat. Mus.,1893, p. 273. 



Female. — Length 1.20 mm. Head wider than the thorax, twice as 

 wide as long, slightly emarginate behind; head and thorax, except 

 pleural plates and mesonotal knob, shining, finely and irregularly 

 aciculate; vertex rounded behind, separated from the occiput by an 

 inconspicuous carina; lateral ocelli their diameter from the eye mar- 

 gin; thorax two-thirds as wide as long, convex- above, distinctly 

 higher than wide, nearly as high as long; notauli absent; mesonotum 

 with a polished, slightly elevated protuberance, just in front of the 

 scutellum; on either side of the protuberance the margin is obliquely 

 incised and pubescent; scutellum convex, transverse, with a minute 

 spine apically; abdomen one and two-fifths times as long as the head 

 and thorax united, shaped somewhat as in the females of the genus 

 Eurytoma, deeper below the lateral carina than above it, elliptical 

 when seen from the side, nearly three times as long as wide, higher 

 than the thorax; second tergite twice as long as wide, strongly 

 convex, polished (as is also the rest of the abomen except the last 

 tergite); tergites three-five short, tranverse, subequal; sixth tergite 

 triangular, a little longer than wide, aciculate, pointed apically; ovi- 

 positer exserted in the paratypes, as long as the abdomen, not 

 visible in the type; wings hyaline, the anterior ones without marginal 

 cilia. Black; antennae, except the club, and legs, except the tarsi, 

 dark brown; club piceous; tarsi stramineous. 



Male. — Length 1 mm. Abdomen a little longer than the thorax, 

 not quite as' high, more strongly convex below than above, ellipti- 

 cal, twice as long as wide; second tergite two-thirds as long as wide; 

 following segments subequal in length, and, with the exception of the 

 terminal one, broadly transverse, united not quite one-half as long as 

 the second; antennae pubescent, dark brown in color. 



Tyije locality. — District of Columbia. 



Pai'atype locality . — Virginia. 



Type.—C&t. No. 2269, U.S.N.M. Type female and allotype male 

 selected. 



