ART. 15«. REVISION OF SUBFAMILY PLATYGASTERINAE— FOUTS. 67 



Type of solidaginis.—Csit. No. 24G06, U.S.N.M. The female and 

 allotype male selected. 



Type ofangulatus. — Cat. No. 25439, U.S.N.M. Type male selected. 



Redescribed from the type series, eight females and three males. 

 They were reared by Ashmead at Jacksonville, Florida, from Ceci- 

 dom.yia nebulosa Ashmead MS. 



I have reared many specimens from black blister galls on Solidago 

 collected in the valleys around Mount Holly Springs, Pennsylvania. 

 The galls are numerous in June and July and the plants are spotted 

 with them. A species of Eulophid was also reared from the galls. 



The Museum contains specimens from Raleigh, North Carolina, 

 reared April 11, 1902, from stem galls on aster and recorded in the 

 North Carolina Department of Agriculture under Cat. No. 271. 



The specimens Ashmead refers to '^ as having been reared by Doc- 

 tor Riley at Bushberg, Missouri, were really reared by Theodore Per- 

 gande and are now the types of my new species variabilis hereinafter 

 specifically described. 



The specimens reared by Miss Murtf eldt from a gall on Solidago at 

 Kirkwood, Missouri, also belongs to variabilis. 



32. PLATYGASTER PLUTO (Ashmead). 



Hypocampsis pluto A.SB.tiEA.T), Can. Ent., vol. 19, 1887, p. 131, female. — Cres- 

 soN, Sya. of Hym., 1887, p. 250.— Ashmead, Bull. 45, U. S.Nat. Mus., 1893, 

 p. 298, pi. 12, fig. 10, female. 



Female. — Length 1.50 mm. Head over twice as mde as long, not 

 emarginate behind, flattened in front, wider than the thorax; occiput 

 and vertex strongly transversely striate; vertex produced over the 

 eyes, the projection long and narrowly rounded, seen from above 

 extending to the outer margin of the eye, situated behind the middle 

 of the head; cheeks flattened, shagreened; interocellar area finely 

 shagreened; frons polished, unsculptured (except above the antennae 

 where there are a few striae ) ; pedicel twice as long as wide, as long 

 as joints three and four united, wider than four; joint three as wide 

 as long, half as long as four, narrower; five a little longer than four, 

 one and one-half times as long as wide, as wide as four; six to nine 

 a little longer than wide, oblong, wider than two; ten longer than 

 the pedicel, over twice as long as wide, blunt at apex, the sides par- 

 allel; pronotum aciculate laterally; mesonotum shagreened, more 

 finely so posteriorly; notauli briefly indicated, the median lobe 

 broadly rounded posteriorly, projecting upon the scutellum; scutel- 

 lum circular, highly convex, polished, sparsely pubescent laterally; 

 abdomen broadly elliptical, as long as the head and thorax united, 

 slightly wider than the thorax, a little less than twice as long as wide; 



"Bull. 45, U. S. Nat. Miis., 1893, p. 307 



