146 



CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Described from two males and nine females taken by me 

 on pine at Keen Camp, San Jacinto Mts., Calif., June 6-12, 

 1917, at an altitude of 5000 to 7000 feet. This species 

 agrees with sericans Stal, in the opaque surface, but the latter 

 has the vestiture much longer and conspicuously gray, the 

 dextral male clasper much longer, head less produced be- 

 yond eye, knees and tibiae mostly pale, and all coxal cavities 

 white. Of sericans I have before me two males, one macrop- 

 terous and one brachypterous, taken by Dr. E. C. Van Dyke 

 in Unalaska, the former at Glacier River, July 2, 1907, the 

 latter at Mokushin Bay, July 15, 1907, one pair from Van- 

 couver Island taken by the late Geo. W. Taylor, and a 

 series taken by Dr. G. Dallas Hanna on the Pribilof Islands, 

 Alaska. 



Holotype, male, No. 798, and Allotype, female, No. 799, 

 Mus. Calif. Acad. Sci. 



Type locality, Keen Camp, San Jacinto Mountains, Calif. 



2. Irbisia californica, new species 



Polished black; vestiture long, golden-gray, suberect; legs 

 fulvous or fulvo-testaceous; membrane with pale mark at 

 apex of cuneus; sinistral male clasper large, abruptly el- 

 bowed. Length about 7 mm. 



Head oblique, produced beyond eye for a space one-half greater than length 

 of eye; eye produced and much narrowed below; vertex flattened between 

 antennae; clypeus abruptly depressed at tip; temporal areas poorly dis- 

 tinguished ; segment II of antennae three times length of I ; III and IV equal, 

 together four times length of I. Pronotum rugosely punctured, the callosities 

 large, shagreened ; scutellum strongly wrinkled; elytra distinctly, closely 

 punctured. Vestiture close long, golden-gray, erect on head and pronotum, 

 somewhat appressed on the elytra; antennae minutely gray-pubescent, this 

 pubescence black on segment I and base of II, with a few longer bristles on 

 base of I. Beneath mostly polished black, the venter with minute pale 

 pubescence, the genital segment with a few long pale hairs; rostrum attain- 

 ing middle of intermediate coxae. Sinistral male clasper large, broad, ab- 

 ruptly elbowed at apex of genital segment, its apical portion longer than 

 basal, triangularly expanded immediately before its truncated apex; dextral 

 clasper long, thick and terete, nearly attaining apex of sinistral. 



Color, black, polished; rostrum and legs fulvo-testaceous, femora more or 

 less marked with brown, beneath usually with a row of brown dots; tibial 

 spines and tarsi black; coxae mostly, margins of coxal cavities and orifices, 

 white; membrane fuscous with small pale mark at apex of cuneus. 



Described from numerous examples of both sexes repre- 

 senting the following localities in California: Hills back 



