ART. 15«. REVISION OF SUBFAMILY PLATYGASTERINAE — FOUTS. 77 



nae short and stout, the chib joints wider than long; thorax three- 

 fourths as wide as long, convex above; pronotum finely shagreened, 

 the carinae obsolescent; notauli faintly indicated 

 on basal half of mesonotum; mesonotum (except ^Hm 



median lobe posteriorly and lateral lobes out- >w'%^ 



wardly) finely shagreened; scutellum circular, with / |iF 111 \ 

 a narrow margin laterally, polished, with a few / i M \ 



scattered short white hairs; metapleura, propo- / 'I " \ 

 deum, and first sternite covered with short white / \ 



hairs; first and second tergites without pubes- 1 I 



cence; abdomen a little longer than the thorax, \^^r;' .-^ 



broadly elliptical; median area on first tergite \^;7 r'~Tr7Try 

 broad and flat, not much elevated, the lateral srf ^ -■ -/^ 



areas narrow; striae on second tergite strong ^<^ 



and extending a little beyond the middle of the fig. 7.— plattgaster 

 segment; following segments not sculptured, each saucicola (ashmead). 



, PI 1 • 1 • • • Abdomen of female. 



traversed by a row 01 short white hau"s; wmgs 

 hyaline, extending a little beyond the apex of the abdomen. Dark 

 reddish brown to blackish; antennae and legs brown, the coxae and 

 femora a little darker. 



Male. — Length 1.15 mm. Head lost; abdomen as long and as 

 wide as the thorax, more or less egg-shaped, truncate behind, three- 

 fourths as wide as long; segments three to seven united one-third as 

 long as the second; wings slightly touched with brown, extending 

 nearly the length of the second tergite past the apex of the abdomen. 

 Coloration as in female. 



Type locality. — Los Angeles, California. 



Type.— C&t. No. 2281, U.S.N.M. Type male and allotype female 

 selected. 



Redesoribed from the type material, eight females and one male, 

 reared by A. Koebele from a Cecidomyid gall on the midrib of willow. 



The females vary in size and color, one specimen being one milli- 

 meter long and of a pale brmvnish color. In order that it may not 

 be necessary to consult the original description I quote Ashmead in 

 regard to the antennal structure of the male: '* pedicel oval, not longer 

 than the second funiclar joint; first funiclar joint moniliform; second 

 thickened at tip, and longer than any of the club joints except the 

 last; club joints except the first, not longer than thick, the last 

 pointed, fusiform, twice as long as the penultimate." 



43. PLATYGASTER VIRGINIENSIS (Ashmead). 



Pohjgnotus virginiensis Ashmead, Bull. 45, U. S. Nat. Mtis., 1893, p. 309. 

 Pohjgnotus proxhmts Ashmead, Bull. 45, U. S. Nat. Mus., 1893, p. 312. 



Female. — Length 1.3 mm*. Head shaped as in viticola; occiput 

 more finely striate than in viticola; cheeks shagreened and with aoic- 

 ulae posteriorly; frons very finely and obliquely aciculate, shining; 



