ART. 15«. REVISION OF SUBFAMILY PLATYGASTERINAE FOTJTS. 79 



Type locality. — ^Arlington, Virginia. 



Other localities. — District of Columbia. 



Type.~Q^i. No. 24608, U.S.N.M. Type female and allotype male 

 selected. 



Redescribed from the type series, four females and three males, in 

 the collection of the United States National Museum. P. proximus 

 Ashmead I can not separate from this species. The males vary con- 

 siderabl}^ in size, the length varying from 0.9 mm. to 1.3 mm. One 

 male of proximus has the fourth antennal joint widened apically, 

 more or less sharply produced at lower angle, wider than the third. 



Altogether there are thirteen specimens of this species in the 

 National Museum, the type series of proximus (Cat. No. 2289, U.S. 

 N.M., type and allot^^pe selected) consisting of six specimens. The 

 types of virginiensis were collected, not reared; those of proximus 

 were reared from Cecidomyia c.-ananassa Riley on cypress. 



44. PLATYGASTER ATRIPLICIS (Ashmead). 



PoJygnoLus atriplicis Ashmead, Bull. 45, U. S. Nat. Mus., 1893, p. 308. 



Female.- — Length 1.5 mm. Head shaped as in salicicola, twice as 

 wide as long; occiput striate as in saZicicoZa ; cheeks shagreened; inter- 

 ocellar space almost smooth, very faintly aciculate: frons covered 

 with wavy aciculae; antennae more slender than in salicicola, the 

 club- joints longer than wide; thorax two-thirds as 

 wide as long, shaped as in salicicola, more highly 

 polished; pronotum shagreened, below on the sides 

 longitudinally aciculate, polished behind; median 

 area polished, wider than long, the carinae appear- 

 ing as sutures, curved outwardly in the middle; 

 mesonotum faintly shagreened anteriorly, finely 

 aciculate in middle of median lobe, otherwise 

 polished ; soutellum convex, with a narrow margin 

 laterally, polished, with a few short hairs on sides; 

 metapleurae, propodeum laterally, and first sternite, 

 covered with v\^hite pubescence; first and second ter- pj^ s. — platygaster 

 gites without pubescence; abdomen the length of ateipucisc ashmead). 



.1 j2 , ,1 J.1 ii J.1 • ] Abdomen of female. 



the hrst segment longer than the thorax, as wide 

 as the head, distinctly wider than the thorax; median area on 

 first tergite quadrate, higher than in salicicola; second tergite 

 strongly striate basally, the striae not quite reaching to the middle 

 of the segment; wings hyaline, reaching to apex of abdomen. 

 Black; antennae and most of legs piceous; tibiae in part, and tarsi, 

 lighter in color. 



Male. — Length 1.3 mm. Differs from the female in antennal and 

 abdominal characters. The abdomen is a little longer and wider 

 than the thorax, broadly rounded apically; wings extending slightly 

 beyond the apex of abdomen: legs as in female; antennae piceous. 



