ART. 15». REVISION OF SUBFAMILY PLATYGASTERINAE FOUTS. 81 



and propodeum densely pubescent, the silvery hairs decumbent on the 

 former, erect on the latter; first and second tergites hairless; abdo- 

 men broadly elliptical, about as long as the head and thorax united, 

 a little over twice as long as wide; first tergite slightly over twice 

 as wide as long (proportion variable), the anterior 

 edge elevated, with many regularly placed longi- 

 tudinally carinae (sometimes coalescing) ; median 

 area quadrate, carinate. the dorsolateral ridges not 

 prominent, sometimes obsolete, the tergite evenly 

 rounded above; second tergite about as wide 

 apicaliy as long, twice as wide at apex as at base; 

 basal foveae long and deep, striate, the striae 

 radiating to a little beyond the middle of the 

 segment; area between the foveae with a few 

 short carinae; tergites three to five inclusive, sub- 

 equal in length and width, the sides oblique, 

 straight; last tergite triangular, as long as the ^^^ io.-platygastek 

 first, one and one-half times as wide as long, asynaptae(Ashmead). 



-, .1, ,1 •! i-ii • 1 1- Abdomex of female. 



blunt apicaliy, the sides straight; wmgs hyaline, 

 reaching to the apex of the abdomen. Black; antennae and legs 

 dark reddish brown to piceous; tarsi and anterior tibiae at tips 

 yellowish brown. 



Male. — Length 1.6 mm. Mesonotum more strongly shagreened than 

 in the female, polished on posterior half; antennae moderately stout; 

 pedicel one-half times as long as wide; third joint about as wide as 

 the second,. as long as wide, a little over half as long as the second, 

 not very closely joined to the fourth; fourth about as long as the 

 pedicel, distinctly wider, about one-half longer than wide, straight, 

 not obliquely excised below, a little wider apicaliy than basally; 

 joints five to nine inclusive subequal in length and width, as wide as 

 the fourth at apex, very little longer than v/ide; last joint as long as 

 third and fourth united, conical, sharply pointed apicaliy; abdomen 

 as long as the thorax, wider, spatulate, convex above and below, 

 indistinctly less than twice as long as wide, broadly rounded apicaliy; 

 coloration as in female. 



Type locality. — May wood, Illinois. 



Type.—Ciyt. No. 2295, U.S.N.M. Type female and allotype male 

 selected. 



Host. — Asynapta, species on willow. 



Redescribed from the type series, nine females and seven males. 

 The types are mounted on points and are, as a whole, in pretty good 

 condition. The heads are lost from four specimens, three females 

 and one male (the male has lost the thorax as well as the head). 

 Two specimens originally included in type series represents an unde- 

 scribed species of Leptacis Foerster. 



