Ai?T. 15". REVISION OF SUBFAMILY PLATYGASTERIXAE FOUTS. 103 



a little longer than wide, longer than nine, acutely pointed a])ica.lly, 

 its lower side straight; thorax as wide as high, moderately convex 

 above; pronotum finely aciculate laterally; mesonotum mostly 

 polished, finely shagreened anteriorly; notauli distinct on basal half 

 of mesonotum, the median lobe broad and truncated posteriorly; 

 scutellum transverse, highly convex, narrowly margined, polished, 

 pubescent as in vernoniae; abdomen distinctly less than twice as long 

 as wide, broadly elliptical, subacute apically, as wide as the thorax, a 

 little shorter tlian the head and thorax united; second tergite as wide 

 as long, not much narrowed anteriorly; striae few and not extending 

 past the apices of the foveae; space between the foveae with a number 

 of short carinae; last four tergites united a little over half the length 

 of the second; tergites three and four subequal; five half as long as 

 four; six as long as four, much wider than long, rounded apically; 

 wings slightly infuscated, extending the length of the last four seg- 

 ments past the apex of the abdomen. Black; antennae and most of 

 legs dark brown; apices of front tibiae, tibiae basally, and tarsi 

 (except the last joint of each) yellowish in color. 



Male. — Length 0.8 mm. Antennae very short, the flagellum much 

 shorter than the thorax; pedicel one and one-half times as long as 

 wide, a little wider than the third joint, as wide as but distinctly 

 longer than the fourth; joint three transverse, slightly narrower than 

 four which is a little longer than wide, not at all widened apically, in 

 fact somewhat narrowed; five as wide as long, a little wider than 

 four; joints six to nine distinctly transverse, as wide as five; ten a 

 little shorter than three and four united, sharply pointed apically, 

 the sides curved; abdomen egg-shaped, a little longer but no wider 

 than the thorax, twice as long as wide; wings hyaline, extending a 

 little more than the length of the last five segments united past the 

 apex of the abdomen. 



Tyye locality. — Holderness, New Hampshire. 



Type.—C&.i. No. 2300, U.S.N.M. Type male and allotype female 

 selected. 



Redescribed from the type material, four females and one male 

 These specimens were reared May, 1884, from a Cecidomyid gall on 

 Aster collected by A. Koebele. 



In the male type the second tergite is more strongly striate than 

 in the females. 



69. PLATYGASTER RUBI (Ashmead). 



Polygnotxis rubi Ashmead, Bull. 45, U. S. Nat. Mus., 1893, p. 315. — Brue.s, Bull. 

 22, Conn. Geol. Nat. Hist. Surv., 1916 (1917), p. 538. 



Female. — Length 1 mm. Head twice as wide as long, not emarg- 

 inate behind, feebly convex in front; occiput aciculate; cheeks sub- 

 convex, finely shagreened above; vertex subacute; interocellar area 

 polished, unsculptured; frons without sculpture except below where 



559(J— 24— Proo.N.M.vol.OS 25 



