30 PEOCEEDi:r>rGS of the national museum vol. 80 



apical segment of labial palpus very little longer than the preceding 

 segment ; antennae of type broken. 



Thorax stout; scutellum large, more than half as long as propo- 

 deum; propodeum finely, more or less transversely, sculptured; pro- 

 notum laterally polished, without foveae in the depression; meso- 

 pleura smooth ; metapleura a little roughened on apical half ; apical 

 teeth of trochanters well developed, conspicuous ; radius arising from 

 a little beyond middle of stigma ; nervulus postfurcal by about half 

 its length ; submedian cell sparsely hairy apically ; nervellus usually 

 a little longer than lower abscissa of basella. 



Abdomen stout ; first tergite unusually broad, usually not distinctly 

 one and one-half times as long as broad at apex, delicately, irregu- 

 larly, longitudinally aciculate; distance between spiracles of first 

 tergite usually greater than half the basal width of propodeum; 

 second tergite not quite as long as broad, faintly longitudinally acicu- 

 late on basal two-thirds, the depressed lateral margins unusually broad 

 at the base ; third tergite much broader than long ; third and follow- 

 ing polished ; ovipositor sheaths about as long as the body. 



Yellow-ferruginous; palpi paler; base of mandibles concolorous 

 with face ; antennae brown, scape and pedicel paler ; propodeum more 

 or less inf uscated except anteriorly ; first tergite also in part more or 

 less dusky; legs deep testaceous; wings hyaline; stigma brown, con- 

 spicuously pale at base, or yellow with a brownish cloud in apical 

 half. 



Male. — In the allotype the propodeum is darker than in the type ; 

 also the first tergite, except at apex, and the fourth and following 

 tergites are blackish. 



Ty^^e.— U.S.N.M. No. 43507. 



Type locality. — Chatham, Mass. 



Host. — Pyrausta nubUalis Hiibner. 



Remarks. — Described from eight females and six males: The 

 type, allotype, and eight paratypes reared in the Bureau of Entomol- 

 ogy by R. A. Biron from P. nubilalis taken at the type locality ; three 

 paratypes reared by D. W. Jones from the same host, taken at Sa- 

 lem, Mass., under Webster No. 16490; and one paratype taken at 

 Glassboro, N. J. I have seen 27 additional specimens, all reared 

 from P. nubilalis taken in eastern Massachusetts, in the collection of 

 the corn borer laboratory at Arlington, Mass. In this material the 

 number of segments in the antennae ranges from 50 to 54. There 

 is a little variation in color of thorax and abdomen, but the mesoscu- 

 tum and the second and third abdominal tergites are always entirely 

 testaceous. In length these specimens range from 5.5 to 7 mm. 



