100 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.63. 



Male. — Length 1 mm. Antennae piceous, pubescent; pedicel twice 

 as long as wide: twice as long as the third joint; joint three spheri- 

 cal, as wide as the second; four about as wide as two, scarcely 

 widened apically; joints five to ten about one and one-half times as 

 long as wide, cylindrical; ten as long as three and four united, sharply 

 pointed apically. 



Type locality. — Manitou, Colorado. 



Type.— C'^t. No. 25443, U.S.N.M. Paratype in Collection Fonts. 



Described from two females and one male reared by J. H. Pollock, 

 May 4, 1916, from a Cecidotnyid on Piiius edulis and recorded in the 

 Bureau of Entomology under "Hopk. U. S. No. 13800^" 



This species might possibly be placed in the group having the upper 

 part of frons aciculate. The face is not, however, aciculate, but faintly 

 shagreened and must be observed closely before any decision is made. 

 In the type and allotype the upper part of the face is not at all sculp- 

 tured. It is onl}^ in the female paratype that shagreening of the 

 upper part of the frons occurs. 



66. PLATYGASTER ROHWERI, new species. 



Female. — Length 1.3 mm. General appearance of pirii Fonts; body 

 elongate; thorax higher than wide; abdomen flattened; head twice 

 as wide as long, not excavated behind, the cheeks subconvex; occiput 

 transversely striate; cheeks aciculate above, shagreened below; inter- 

 ocellar area shining, not distinctly sculptured; space around ocelli 

 indistinctly shagreened; frons mostly unsculptured, finely diagonally 

 aciculate below; antennae elongate, not much thickened toward apex, 

 the flagellum distinctly longer than the thorax; pedicel twice as long 

 as wide, as long and about as wide as joint six; joint three half as 

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

 a little shorter and narrower than two, cylindrical; six to nine sub- 

 equal, about twice as long as wide, cylindrical; ten as long as three 

 and four united, as wide as nine, pointed, the sides on basal two- 

 thirds parallel; thorax convex above; pronotum aciculate laterally; 

 mesonotum mostly polished, finely shagreened anteriorly; notauli dis- 

 tinct on basal half of mesonotum, the median lobe broadly rounded 

 behind; scutellum circular, convex, not so highly elevated as in pinif 

 without sculpture and without pubescence above, narrowly margined 

 laterally ; abdomen the length of the last segment longer than the 

 head and thorax united, rather strongly flattened above and below, 

 slightly narrower than the thorax; first tergite rounded above, the me- 

 dian area not well defined; second tergite as wide as long, twice as wide 

 apically as basally; interfoveal space with a few very short carinae; 

 foveae striate, the striae reaching the middle of the segment; follow- 

 ing tergites polished; wings hyaline, extending to the apex of the 

 abdomen. Black; antennae and legs (except tarsi, tibiae, femora 

 basall}^, and trochanters, which are brownish) piceous. 



