102 PROCEEDINGS OF THE NATIONAL MUSEUM. voi>. 63. 



the median lobe truncate posteriorly; scutellum circular, convex, 

 polished, sparsely pubescent, narrowly margined laterally; abdomen 

 as long as the head and thorax united, as wide as the thorax, twice 

 as long as wide; striae on second tergite fine and extending to the 

 middle of the segment; interfoveal area with five short striae; tergites 

 beyond the second not sculptured, each transversed by a row of short 

 white hairs; wings hyaline, extending the length of the last segment 

 past the apex of the abdomen. Black; antennae and legs fuscous; 

 pedicel, anterior tibiae apically, and all tarsi (except the last joint of 

 each) brownish. 



Male. — Length 1 mm. Antennae piceous, structurally indistinguish- 

 able from those of vernoniae Ashmead; abdomen spatulate, a little 

 shorter than the head and thorax united, three-fourths as wide as long; 

 segments three to seven united half as long as the second ; wings hyaline, 

 extending nearly the length of the second tergite past the apex of 

 the abdomen. Legs brownish, tarsi and anterior tibiae apically, 

 yellowish. 



Type locality. — Fort Huachuca, Arizona. 



Type.— Cht. No. 229G, U.S.N.M. Type male and allotype female 

 selected. 



Redescribed from the type series, twelve females and one male. This 

 material was reared " from a Cecidomyid pod-like gall on an unknown 

 plant, sent to the department by H. K. Morrison." Ashmead^^ says 

 there are some specimens in the type series which were reared from 

 a Cecidomyid stem gall on sunflower. I can not find any speci- 

 mens with such data. All the type specimens in the Museum are 

 labeled as having been reared on June 6 and 16, 1883, and bear the 

 number "3107." 



One female specimen has the reflexed plate on the side of the 

 abdomen oblique, not horizontal, as the others have it. 



68. PLATYG ASTER ASTERICOLA (Ashmead). 



Polygnotus astericola Ashmead, Bull. 45, U. S. Nat. Mus., 1893, p. 320. Female 

 (in part) and male. — Brues, Bull. 22, Conn. Geol. Nat. Hist. Surv., 1916 

 (1917), p. 518. 



Female. — Length 0.8 mm. Head twice as wide as long, as wide 

 as the thorax, slightly emarginate behind, strongly convex in front; 

 occiput aciculate; cheeks convex, shagreened; frons polished, un- 

 sculptured except below where there are faint diagonally directed 

 acioulae; antennae rather stout, the flagellum distinctly shorter 

 than the thorax; pedicel twice as long as wide, as wide as joint 

 six, but longer, as long as joint ten; joint three half as long as 

 two, a little narrower than four; four and five subequal, as long 

 as six but narrower; joints seven to nine as wide as long; ten conical, 



"Bull. 45, U. S. Nat. Mus., 1893, p. 317. 



