Ai!T. 15«. REVISION OF SUBFAMILY PLATYGASTERINAE FOUTS. 61 



Male. — Length 1 mm. Similar to the female in most respects. 

 Pedicel twice as long as wide, as wide and as long as joint five; third 

 joint as wide as long, narrower than the pedicel; fourth joint as long 

 as the pedicel, and also as wide (except at apex where it is broadened 

 and rather sharp on the outside) ; inside edge of fourth joint not 

 appreciably curved; joints six to nine subequal, twice as long as wide, 

 thickly covered with short white hairs; tenth joint as wide as the 

 ninth, distinctly longer than joints three and four united; abdomen 

 spatulate, rounded apically, narrower than the thorax, less than 

 twice as long as wide. 



Tyi^c locality. — New York. 



Other localities. — -Washington, District of Columbia : Arlington, Vir- 

 ginia; and Lafayette, Indiana. 



Type.— Cat. No. 1840, U.S.N.M. Type female selected. 



Described from Fitch's type material, six females and one male. 

 Only one female is in good condition. I could not even decide 

 whether the male really belongs to this species. The type of my 

 description of the male is a specimen reared by Prof. F. M. Webster 

 from Diplosis tritici. 



27. PLATYGASTER COMPRESSIVENTRIS (Ashmead). 



Polynucus compressiventris Ashmead, Bull. 45, U. S. Nat. Mus., 1893, p. 28"J. 

 Female. — Length 3 mm. Head about twice as wide as long seen 

 from above, omarginate behind, the cheeks wide; frons convex, with 

 a short indistinct furrow below the anterior ocellus; vertex, intero- 

 cellar area, frons on sides, very faintly shagreened, polished medially, 

 just above the antennal process with a few faint transverse aciculae ; 

 antennal process short and broad, truncate, the anterior edge not 

 raised: "pedicel oval, not quite as long as the first and second funic- 

 ular joint united; first funicular joint narrowed, but twice as long 

 as thick; the second stouter, obconic; third and fourth about equal, 

 obconic, but longer than the second; the three following joints bell- 

 shaped, loosely joined, the last conical, longer than the preceding''; 

 thorax about as high as wide, slightly flattened above; a narrow, 

 vertical band medially placed on the pronotum shagreened; central 

 area of pronotum unsculptured (except at edges where there are a 

 few striae), wider below, the ridges curved outwardly below and in- 

 wardly above; notauli complete, meeting in a sharp point posteriorly; 

 median lobe of mesonotum shagreened, polished posteriorly; lateral 

 lobes shagreened on a wide band along the sides of the notauli; 

 scutellum transverse, considerably flattened; margined laterally, pol- 

 ished and unsculptured, with a fcAvfine hairs on the sides; metapleurae 

 and pronotum laterally covered with short pubescence; first tergite 

 sparsely pubescent laterall}^, a little less than twice as wide as long, its 

 anterior edges highly elevated, the median area quadrate, with an 



