56 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 69 



rugulose, sometimes mostly smooth, always with two median longi- 

 tudinal carinae that diverge very slightly behind; mesopleural furrow 

 minutely foveolate; first abdominal tergite broad, closely ruguloso- 

 striate; second tergite usually mostly rugulose and with a curved 

 transverse impression near the middle; third tergite sometimes partly 

 sculptured; ovipositor sheatlis about two-thirds as long as the body. 

 Head and thorax black; wings slightly dusky to hyaline; all coxae 

 and trochanters usually blackish, the remainder of the legs mostly 

 brownish yellow; rarely, the coxae and trochanters more or less fer- 

 ruginous; abdomen varying from entirely black to nearly entirely 

 ferruginous. Length usually 2 to 4 mm. 



The above discussion is based on a study of the types of pygmaeus, 

 meridionalis, wichitaensis, and castaneicinctus; and a large amount of 

 material in the National Museum, which includes collected speci- 

 mens from Maryland, Texas, Colorado, Michigan, California, Vir- 

 ginia; New Mexico, Georgia, Kansas, Illinois, New York, Massachu- 

 setts, and Canada, and the following reared material: Eight 

 specimens from PJithorimaea glochinella Zeller, at Baton Rouge, 

 Louisiana (T. H. Jones) ; 7 reared from the same host, at the same 

 locality, by J. L. E. Lauderdale under Chittenden No. 4268; 5 from 

 PJithorimaea operculella Zeller, at Los Angeles, California (J. E. 

 Graf) ; 2 from MompJia steUella at Riverton, New Jersey (H. B. 

 Weiss); 10 from the same host at Washington, D. C. (A. Busck) ; 3 

 specimens reared from Mompha, species at Vienna, Virginia, under 

 Quaintance No. 7187; and 1 labeled as reared from " Gortyna nitela" 

 in Missouri. 



30. BASSUS BREVICORNIS. new species 



Very similar to tibiator, but distinguishable- at once by the shorter 

 antennae and the longer ovipositor. Although the smallest specimens 

 of hrevicornis are as large as the largest tibiator, the number of seg- 

 ments in the antennae is always smaller. The first tergite is usually 

 more coarsely striate than in tibiator, the labrum is more strongly 

 hairy, the wings somewhat more deeply infuscated, and the mesopleu- 

 ral furrow usually more coarsely foveolate; the last segment of the 

 posterior tarsi scarcely as long as the third, while in tibiator it is 

 usually longer. 



Female — Length, 5.5 mm. Face very long; malar space usually 

 longer than the eyes; face strongly convex down the middle line; 

 clypeus very long; labrum rather large, closely hairy; palpi slender! 

 third segment of labial palpi not shortened, nearly as long as the 

 foiu-th; frons immargined; head strongly hollowed out behind; 

 ocell-ocular line about one and one-half times as long as the 

 diameter of an ocellus and not longer than the postocellar line; 

 antennae short, 22-segmented in the type; scape not large; pedicel 

 slightly longer than broad; flagellum slender, not tapering at all to 



