120 



ON SOME HYMENOPTERA (chiefly lUKlescril.ed) 



COLLECTED BY PROF. C. F. BAKER IN NEVADA AND SOUTHERN 



CALIFORNIA 



BY P. CAMERON 



3449 Ancistrocerus trichionotus sp. nov. 



Black, the clypeus, mandibles except lielow and the ajiex, a small mark 

 wider than long above the antennae, under side of antennal scape, a 

 minute mark behind the eyes near the top, a narrow line roundly narro- 

 wed in the middle, the sides obliquely narrowed, an irregular line on the 

 outer side of the tegulae, two broad marks on the apex of the scutellum 

 and broadish bands (the first dilated laterally) on the apex of the ab- 

 dominal segments, lemon-j^ellow. Legs black, the under side of the four 

 front coxae, the four front femora below and the tibiae and tarsi, yellow. 

 Wings yellowish hyaline, the apex in front sinoky, the stigma testaceous. 

 Male. Length to end of second segment 8 mm. Stanford University, Ca- 

 lifornia. 



Apical two or three joints of the antennae and the claw rufous; the 

 claw stout, conical, reaching to the apex of the penultimate joint. Front 

 and vertex (dosely, rngosely punctured, more closely on the front than 

 on the vertex; in the center of the front the punctures run into reticula- 

 tions. Antennal keel narrow, but distinct. Clypeus longer than broad, the 

 top bluntly rounded, the apex with a rounded incision which is twice 

 wider than k>ng. Pro-and meso-thorax coarsely and closely rngosely 

 punctured; on the sides irregularly reticulated. There are two furrows on 

 the sides of the apical half of the mesonotum. Postscutellum more coar- 

 sely, rugosely punctured than the scutellum; its apex with an oblique 

 slope. Sides of metanotum keeled, the bottom projecting into a broad 

 blunt tooth. Pro-and mesopleurae more coarsely rugosely punctured than 

 they are above; the rest strongly, bvit not closely punctured. Postscute- 

 llum with an oblique slope, rounded before and behind, laterally narro- 

 wed to a point; the basal half smooth, the apical strongly punctureci. 

 Median segment with a steep slope, very short, the sides rounded but 

 with a distinct outer margin. The part at the sides of the scutellum ye- 

 llow, thickly covered with silvery pubescence. First abdominal segment 

 cup-shaped, short, the sides rounded; the second distinctly longer than 

 wide. 



34.51 Ancistrocerus ormsbyensis sp. nov. 



Length to end of second abdominal segment (v7 mm. ^Nlale. Taken in 

 Ormsby county, Nevada. 



This species is closely allied to A. trichionotux and has, like that spe- 

 cies, the head and thorax densely covered with long pale pubescence. The 

 two may be separated thus: 



