48 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.63. 



rather short, densely pubescent, polished, with several carinac along 

 their inner margins; second sternite densely pubescent basally; ter- 

 gites three to six polished, subequal in length, each traversed by a 

 row of short white hairs; last five segments united not quite half as 

 long as the second; sixth tergite triangular, sharply pointed apically, 

 a little wider than long, one-third as wide as the third segment ; wings 

 hyaline, 1.83 mm. long, with a short marginal fringe. Black; legs 

 varying from piceous to light brown or stramineous, the anterior 

 tibiae apically and all tarsi pale; antennae dark brown. 



Male. — Length 1.5 mm. Pedicel a little longer than the fourth 

 joint, twice as long as wide, twice as long and twice as wide as joint 

 three; fourth joint wider than any of the following joints, not much 

 longer than wide, cylindrical; fifth joint as long and as wide as the 

 pedicel; joints six to nine subequal, cylindrical, about one and one- 

 half times as long as wide, wider and longer than joint five, thickly 

 covered with white hairs which equal in length half of the diameter 

 of the joints to which they are attached; joint ten three times as long 

 as wide, as wide as joint nine; abdomen obovate, with the apical 

 segments distended a little less than two-thirds as wide as long, 

 rounded apically, segments three to seven polished, each traversed 

 by a row of short white hairs. 



Localities. — Western and Northern States. 



Described from a series of 21 specimens. Eight of them, four 

 females and four males, are labeled "448" with the dates varying 

 from March 24 to April 15, 1884. Ten specimens are labeled "448" 

 and were reared, as several other labels indicate, during the period 

 April 4-19, 1889, from old wheat stubble. No more data in regard 

 to this material is available, either on the pins or in the files of the 

 Bureau of Entomology. A male specimen labeled " AneurliyncJius 

 aneurus Prov. Type" is in the national collection and belongs to this 

 species. This specimen is mentioned by Ashmead but can not be a 

 type, as the original description makes no reference to the male. There 

 is also in the collection a female specimen from Pickaway County, 

 Ohio, labeled: "Reared from Phytophaga destructor; 3-1-21; W. H. 

 Larrimer Coll.; Lafayette No. 20115." 



The species does not seem to show any marked variation. Some 

 of the males are less strongly sculptured than others. The posterior 

 part of the mesonotum in such specimens tends to become smooth 

 and polished. 



17. PLATYGASTER LAMPRONOTA. new species. 



Female. — Length 1.09 mm. Head twice as wide as long, slightly 

 emarginate behind, a little wider than the thorax; cheeks convex 

 shagreened posteriorly; occiput finely aciculate; interocellar area 

 shagreened; frons polished; antennae filiform; pedicel as wide as 



