AKT. 15». REVISIOIT OF SUBFAMILY PLATYGASTERINAE — FOUTS. 83 



The female may be separated from the same sex in asynaptae by 

 noticing the rehitive lengths of the terminal antennal joints. In 

 texana the joints eight and nine are twice as long as wide. 



The male would be more likely confused with Iwpinicola but the 

 fourth antennal joint in that species is narrowed at both ends. 



47. PLATYGASTER BURKEI (Rohwer). 



Polygnotus burkei Rohwer, Proc. U. S. Nat. Mus., vol. 53, 1917, p. 170. 



The description given by Mr. Rohwer is incomplete and I doubt if 

 the species could be recognized by it. The figure of the female 

 antenna seems to be correct. This species does not come very close 

 to diplosidis Ashmead. It is nearest related to Memalis and eurotii 

 and may be distinguished from them by using my key to the species. 

 I append the following notes to Mr. Rohwer's description : 



Female. — Length 1.2 mm. Head twice as wide as long; occiput 

 finely striate; frons finely obliquely aciculate; thorax seven-tenths 

 times as wide as long, convex above, a little narrower than the head; 

 pronotum shagreened laterally except at the outer edges of its pos- 

 terior border; median area finely shagreened; mesonotum finely and 

 uniformly shagreened, the anterior carinae obsolete; notauli short but 

 sharply indicated, the median lobe subacute posteriorly; scutellum 

 transverse, highly convex, smooth and shining, not distinctly margined 

 laterally; abdomen a little longer than the thorax, as wide as the 

 thorax across the tegulae, about three-fifths times as wide as long; 

 first tergite strongly raised anteriorly, very short, the median area dis- 

 tinctly wider than long, with an obsolescent median carina; last four 

 tergites not sculptured, with a row of hairs across each one; wings 

 hyaline, extending a little beyond the apex of the abdomen. 



Male. — Length 1.2 mm. Pedicel as in female; fourth joint very 

 wide apically, narrowed basally, the lower side produced apically; fol- 

 lowing joints a little longer than wide; abdomen as long as the thorax, 

 rounded posteriorly, one-third longer than wide; first tergite a little 

 over twice as wide as long; second as in female, a little wider than 

 long, strongly striate on basal half; wings hyaline, extending half the 

 length of the abdomen past its apex. Color as in female. 



Type locality. — Placerville, California. 



Redescribed from the types (Cat. No. 19638) in the United States 

 National Museum. They were reared from ''a Cecidomyid which 

 lives under the bark at the base of the needles of Pinus ponderosa." 

 The type series consists, not of four females and four males as stated 

 by Mr. Rohwer, but of seven females and one male (the allotype). 

 The antennae have shriveled a little and the sexes are not very easy 

 to distinguish. There are numerous other specimens in the Museum 

 with the same ecological data. They are all mounted on points and 

 placed in the systematic oollection. 



