248 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.53. 



equal with the diameter of a lateral ocellus; vertex and posterior 

 orbits more sparsely punctured than the front; antennae tapering 

 apically, the third joint one-fifth longer than the fourth; fourth and 

 fifth subequal; distance between the eyes at the vertex slightly 

 greater than the length of the second and third antennal joints: 

 mesoscutum with distinct, well-defined punctures which become con- 

 fluent laterally; scuteilum similarly punctured; mesepisternum 

 coarsely granular; dorsal aspect of the propodeum with oblique 

 striae except in the apical middle where the striae are transverse, 

 and there is a median longitudinal carina; sides of the propodeum 

 strongly, irregularly longitudinally striate; posterior face truncate, 

 transversely striate; nervulus slightly beyond the basal; second 

 cubital receiving both recurrent veins at a distance from the trans- 

 verse cubiti subequal with the length of the petiole of the second 

 cubital; legs hardly spined, longer calcarium of the posterior tibia 

 half as long as the posterior basitarsus; pygidial area with small, 

 separate, well-defined punctures. Black; abdomen rufous; apical 

 joints of the tarsi rufo-piceous ; wings hyaline with the apical margin 

 dusky; venation dark brown; head and thorax with dense, silvery 

 pile ; apical margin of the first four tergites with dense, silvery pile. 



7'ype-locality. — North Yakima, Washington. Described from one 

 female collected July 14, 1903, by Eldred Jenne. 



Type.— Cat. No. 18998, U.S.N.M. 



Male. — What is probably the male of this species was collected in 

 Alameda County, California, July, 1907, by W. M. Giffard. It 

 agrees very well in the above description of the female, but the fol- 

 lowing characters may be added : Length, 6 mm. Clypeus carinato, 

 produced into a truncate lobe which is again produced into a low, 

 rounded lobe; antennae distinctly tapering, the joints short, the third 

 about one-fifth longer than fourth. 



This male is not considered part of the type material. 



HOPLISUS HAMATUS (Handlirsch). 



One male from Tahoe, Eldorado County, collected June, 1909, at 

 an altitude of 6,200 feet. 



HOPLISUS ATRIFRONS (Fox). 



Three males from Tahoe, Eldorado County, California, 6,200 feet, 

 June, 1909. 



DIENOPUS HOWARDII (Ashmead). 



One male from Summit, Placer County, California, July, 1907. 



NYSSON RUSTICUS Cresson. 



One female from Tahoe, Eldorado County, collected June, 1909, 

 at an altitude of 6,200 feet. 



