236 PROCEEDTNGS OP THE NATIONAL MUSEUM. vol.53. 



Male. — Length to apex of second abdominal segment 5 mm. 

 Clypeus distinctly broader than long, convex, smooth, the apical 

 margin deeply arciiately emarginate; supraclypeal area with a dis- 

 tinct median carina; front shining with sparse well-defined punc- 

 tures; vertex not tuberculate; thorax punctured similarly to the 

 front; the anterior margin of the pronotum carinate, the lateral 

 angles prominent but not tuberculate; depression in front of the 

 scutellum foveolate; propodeum reticulate dorsally; posterior face 

 reticulate or striate; first tergite with large well-defined punctures, 

 the second not quite twice as long and almost impunctate. Black; 

 clypeus, spot on the mandibles, spot between the antennae, scape 

 beneath, dot at the summit of the eyes, two spots on the pronotum, 

 the metanotum, apical margins of the first and second tergites, 

 tibiae, intermediate femora beneath at the apex, and the four ante- 

 rior tarsi, yellow., flagellum brownish beneath; wings dusky hyaline; 

 venation dark brown. 



Type-locality. — Tahoe, Eldorado County, California. Described 

 from four males collected at an altitude of G,200 feet, in June. 1909, 

 by W. M. Giffard. 



Type and parafype.— Cat. No. 20331, U.S.N.M. 



Paratypes in Mr. Giffard's collection. 



ODYNERUS TRUNCATUS Provancher. 



Seven males from Tahoe, Eldorado County, collected June, 1909, 

 at an altitude of G,200 feet. 



ODYNERUS BLANDINUS. new species. 



Related to hlandus Saussure, but judging from the original descrip- 

 tion tlie puncturation of the abdomen in hlandus is much stronger. 



Female. — Length to apex of the second tergite, 9.5 mm. Clypeus 

 with the length and width subequal, convex, and with sparse, well- 

 defined punctures, the apical margin nearly truncate; supraclypeal 

 area with a well-defined median carina; front with close, sometimes 

 confluent punctures; vertex sparsely punctured, not tuberculate; 

 anterior margin of the pronotum strongly carinate, the angles promi- 

 nent; thorax with distinct, well-defined ■ or confluent punctures; 

 dorsal aspect of the propodeum punctato-reticulate, the posterior face 

 irregularly striate and without well-defined inclosing carinae; ab- 

 domen opaque, the first segment almost impunctate, the apical mar- 

 gins of the second, third, fourth, and fifth tergites with closed punc- 

 tures, but not at all reflex. Black; clypeus except margin and a 

 median spot, a spot between the antennae, scape beneath, dot at sum- 

 mit of the eyes, anterior margin of the pronotum, tegulae, spot 

 beneath, two spots on the scutellum, metanotum, sides of the propo- 



