238 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.53. 



the yellow lateral margin, the apical margin of the second and fol- 

 lowing sternites, basal lateral spot on the second sternite, yellow; 

 legs black; femora beyond the middle, tibiae and the first joint of 

 the tarsi j^ellow; the apical joints of the tarsi ferruginous; head 

 with very short brownish hair; wings dusky hyaline, costa and 

 stigma and the rest of the venation brownish. 



Type-locallti/. — Alameda County, California. Described from five 

 females collected July, 1907, by W. M. Giffard, for whom this species 

 is named. 



Type.— Cat No. 20333, U.S.N.M. 



Two para types in Mr. GifFard's collection. 



A specimen from the foothills near Santa Barbara, California, col- 

 lected in August, 1908, probably belongs to this species but the coxae 

 are yellowish beneath and almost the entire second sternite is yellow. 



ODYNERUS ROBUSTUS, new species. 



Female. — Length to apex cf the second tergite, 12 mm.; robust. 

 Clypeus with length and width subequal, irregularly striate medi- 

 anly, punctured laterally, the apical margin nearly truncate; supra- 

 clypeal area not carinate; front closel}' punctured; in the area ad- 

 joining the ocelli the punctures are larger and sometimes confluent; 

 vertex more sparsely punctured, not tuberculate ; anterior margin of 

 the pronotum feebly carinate; thorax punctured similarly to the 

 front; metanotum and dorsal surface of the propodeum coarsely 

 reticulate ; posterior face finely striate, without bounding carina ; api- 

 cal margin of the second tergite with large punctures, but not re- 

 flexed; apical margin of the third, fourth, and fifth tergites punc- 

 tured. Black; clypeus except the lateral margin and an elongate 

 median spot, the inner margin of the eyes to the emargination, a 

 spot between the antennae, scape beneath, posterior margin of the 

 eye, line on the pronotum, tegulae, a spot beneath, two small spots 

 on the scutellum, two spots on the propodeum, apical margin of the 

 first and following tergites, lateral median triangular spots on the 

 first and second tergites, apical margin of the second and following 

 sternites, broader laterally, spot on the coxae beneath, four anterior 

 femora beneath apically, and tibiae, yellowish; tarsi ferruginous; 

 head and thorax with dense brownish hair; wings yellowish hyaline, 

 the apical margin dusky; venation the color of the wings. 



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

 from one female collected at an altitude of G,200 feet, in June, 1909, 

 by W. M. Giffard. 

 ^ Type.— Cat. No. 20334, U.S.N.M. 



ODYNERUS ELDORADENSIS, new species. 



If it were not for the color markings, this might be the male of 

 robustus^ but it differs from that species as follows : Clypeus yellow, 



