ART. 15«. REVISION OF SUBFAMILY PLATYGASTERINAE FOUTS. 87 



than wide apically, twice as wide apically as basally, strongly striate 

 at base, the striae reaching the middle of the segment, the striae 

 between the foveae nearly as long; mixed in with these striae between 

 the foveae are three longitudinal carinae, one median and two sub- 

 lateral ; remaining segments unsculptured ; three to five equally long ; 

 six triangular, wider than long, subacute apically; wings hyaline; 

 extending about the length of the last three tergites past the apex of 

 the abdomen. Black; legs and antennae piceous; tarsi brown. 



Type locality. — San Bernardino County, California. 



Type.— Cat. No. 2293,U.S.N.M. Type selected. 



Kedescribed from the two types in the United States National 

 Museum. They were reared April 17, 1887, from a Cecidomyid gall 

 on Eurotia canata. 



51. PLATYGASTER ATRAE, new species. 



Female. — Length 1.10 mm. The description of cynipicola applies 

 almost equally well to this species. Atrae differs in having the eighth 

 and ninth antennal joints not distinctly wider than long, and in 

 having the abdomen as long as the head and thorax united, more 

 pointed apically. Coloration as in cynipicola; wings hyaline. 



Male. — Length 1.20 mm. Pedicel a little less than twice as long 

 as wide, slightly longer and narrower than joint four; three as wide 

 as long, much narrower than two or four; four about as long as 

 wide at apex, widened apically and subacute below; five as wide 

 as long; six to nine slightly longer than wide, cylindrical, as long as 

 four; ten longer than the pedicel, sharply pointed apically, the sides 

 curved; abdomen longer than the thorax, twice as long as wide; last 

 five segments united one-third as long as the second; wings hyaline, 

 extending one-half the length of the second tergite past the apex of 

 the abdomen. Coloration as in the female ; antennae and legs brown; 

 tarsi paler, yellowish. 



Type locality. — Fort Grand, Arizona. 



Type.— Cat. No. 25442, U.S.N.M. Paratype in Collection Fonts. 



Described from two females and one male reared by H. K. Morri- 

 son, June 5, 1882, from the goldenrod stem gall of Oedaspis atra 

 Loew and recorded in the Bureau of Entomology under Pergande's 

 number "2733«>." 



52. PLATYGASTER FUMIPENNIS, new species. 



Female. — Length 1.3 mm. Habitus of virginiensis but the abdo- 

 men not so elongate; head twice as wide as long, not emarginate 

 behind, about as wide as the thorax; occiput transversely striate; frons 

 aciculate; antennae rather slender, all the joints longer than wide; 

 joints six to ten subequal in width, wider than the pedicel: pedicel 

 much wider than joints two to five which are subequal in width; six 

 to nine equally long, a little longer than wide; abdomen elliptical, 

 5596— 24— rr(X-.N.M.vol.G::5 24 



