38 PROCEEDINGS OF THE NATIONAL MUSEUM vol.69 



a median longitudinal carina on the posterior third; mesopleural fur- 

 row very weakly impressed, polished; inner spur of posterior tibia 

 fully half as long as the basitarsus; apical segment of hind tarsi very 

 large, about as long as the second segment; second cubital cell large, 

 triangular, sessile, both intercubiti straight; first abscissa of mediella 

 about as long as the second; nervellus straight; discoidella entirely 

 wanting; abdomen completely polished; the first tergite without 

 dorsal longitudinal keels and entirely sculptureless, about as broad 

 at apex as long. Head varying from almost entirely testaceous to 

 entirely black; thorax testaceous, usually with the pectus more or 

 less black; anterior and middle coxae and trochanters and the poste- 

 rior trochanters black; posterior coxae varying from mostly reddish 

 testaceous to entirely black; fore and middle femora, tibiae, and tarsi 

 more or less brownish, the femora sometimes blackish basally; pos- 

 terior femora testaceous; their tibiae and tarsi blackish; wings very 

 faintly dusky; abdomen testaceous. 



The above notes are based on the two holotypes, both of which are 

 from Morton County, Kansas, at 3,200 feet elevation. 



11. BASSUS SPIRACULARIS, new species 



Very easily distinguished by the exceptionally large, almost slitlike, 

 propodeal spiracles. 



Female. — Length 9 mm. Face broader than long, finely punctate; 

 malar space much less than half the eye height ; third segment of 

 labial palpi stout, not greatly reduced as in texanus, which species 

 spiracvlaris closely resembles superficially; eyes large, attaining the 

 vertex; a more or less prominent median ridge between the antennae; 

 frontal impressions not margined; ocelli situated on a slight elevation 

 above the rest of the vertex; ocell-ocular line about twice as long as the 

 diameter of an ocellus; antennae long, tapering gradually to the apex, 

 51-segmented in the type; scape stout, distinctly shorter than the 

 first flagellar segment; pronotal pits large and deep, margined by 

 sharp carinae; parapsidal furrows strongly impressed, smooth or 

 weakly foveolate; the middle mesonotal lobe prominent, with two 

 faint median longitudinal impressions; furrow in front of scutellum 

 broad and deep, with several pits usually distinctly sepa,rated; scu- 

 tellum convex, polished, not margined at apex; propodeum areolated, 

 the carinae except the transverse apical carina prominent; the me- 

 dian area long and narrow, sometimes confluent with the petiolarea; 

 propodeal spiracle very large, nearly slitlike, and much less than its 

 length from the anterior margin of the propodeum ; propleura polished 

 with a few oblique rugae anteriorly; mesopleura polished; mesopleural 

 furrow coarsely foveolate; metapleura polished, somewhat rugose 

 below; posterior legs slender; inner spur of hind tibia a little less 

 than half the basitarsus; apical segment of the posterior tarsi slightly 



