ART. 15«. REVISION OF SUBFAMILY PLATYGASTERINAE FOUTS. 55 



where it is smooth, not distinctly striate; head shaped as in shastensis, 

 the vertex rounded; median impression below anterior ocellus distinct 

 but very shallow, not so deep as in shastensis; antennae very long and 

 slender; scape extremely elongate, narrowed basally and not much 

 thickened distally; pedicel about four times as long as wide at apex, 

 club-shaped; third joint a little over thrice as long as wide, very 

 slender, less than half as wide as the second at apex, a little over 

 half as long as the second; fourth about four times as long as wide 

 at apex, narrower at base, distinctly narrower at apex than the 

 second; fifth about as long as the second, as wide as the fourth; 

 joints six to ten, inclusive, a little less than thrice as long as wide, 

 wider medially, the last joint rather sharply pointed apically, the 

 sides on basal two-thirds approximately parallel; pronotum as in 

 sliastensis; mesonotum convex; notauli complete; median lobe sha- 

 greened, gradually becoming smooth toward apex where it is sharply 

 pointed; lateral lobes shagreened only along the inner margin, pol- 

 ished otherwise; scutellum transverse, margined laterally, highly con- 

 vex, polished in the middle, shagreened laterally; metapleurae and 

 propodeum on the sides sparsely covered with short grayish hairs; 

 first and second tergites without pubescence; abdomen strongly flat- 

 tened, one and one-half times as long as the head and thorax united, 

 much wider than the thorax; first tergite twice as wide as long, the 

 median area subconvex, elevated, but with the dorsolateral ridges 

 rounded, inconspicuous; second tergite distinctly wider at apex than 

 long, narrower basally; basal foveae deep and broad, with faint striae 

 on their inner slopes; area between them with a few short striae; 

 tergites beyond the second broadly tranverse, becoming gradually 

 narrower toward apex; six as wide as long, sharply pointed apically, 

 the sides straight; wings tinged with brown, extending nearly the 

 length of the last three segments past the apex of the abdomen. 

 Black, antennae and legs piceous, the anterior tibiae apically and 

 all tarsi somewhat lighter, tinged with yellow. 



Type locality. — Mount View, Colorado. 



Type.— Cat. No. 25437, U.S.N.M. Paratype in Collection Fonts. 



Described from two female specimens from Mount View, Colorado, 

 reared by J. H. Pollock, September 5, 1916, from cones of Picea 

 engelmanni and recorded in the Bureau of Entomology under 

 Hopkins U. S. No. 14284&. Specimens belonging to the genus Las- 

 peyresia and also some unidentified Diptera were reared from the 

 same galls. It is probable that lucida is parasitic on the Diptera 

 (Cccidomyids) , inha])iting the cones. 



23. PLATYGASTER GAHANI, new species. 



Female. — Length 2.50 mm. Habitus of lucida Fonts; the abdo- 

 men, however, not so strongly flattened, the second sternite distinctly, 

 but not extraordinarily swollen; head in shape and sculpture very 

 559(>— 24— Proc.N.M.vol.63 22 



