i cq CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Type locality, Cazadero, Sonoma Co., Calif. 



6. Irbisia sita, new species 



Polished black, head smooth; vestiture rather dense, long, 

 gray; legs fulvous to castaneous; sinistral male clasper 

 large, elbowed. Length 5-S l / 2 mm. 



Head nearly vertical; hardly longer below eye than length of eye; 

 vertex slightly convex between antennae, polished and impunctate; temporal 

 areas scarcely distinguished ; eyes long, much contracted below jclypeus strongly 

 arcuate; second antennal segment 2^2 times length of I; III and IV subequal, 

 together a little longer than II. Pronotum deeply closely punctured, scarcely 

 rugose, callosities scarcely elevated; scutellum feebly wrinkled: elytra ob- 

 scurely punctate; rostrum attaining apex of intermediate coxae. Beneath 

 polished, clothed with conspicuous white hairs, a few on anterior coxae, 

 prosternum and disk of male venter and genital segment longer and suberect. 

 Sinistral male clasper broad, abruptly elbowed as in californica, its broad 

 flattened apex a little exceeded by the terete dextral clasper; vestiture long, 

 soft, white, more erect on head and pronotum. 



Color, deep polished black, bronzed on pronotum and scutellum and less 

 so on elytra, not at all on head and beneath; rostrum and legs fulvous to 

 castaneous, paler or more testaceous on tibiae; extreme tip of tibiae and tarsi 

 black; prosternum, broad margins of coxal cavities, orifices and usually apex 

 of coxae white; tibial spines black; sutures of face sometimes pale. 



Described from five male and five female examples taken 

 by me in San Diego Co., Calif., in April and May, 1913- 

 1914, one male and three females taken by me at Atasca- 

 dero, Calif., April 23, 1919, and three males and one female 

 taken by Fordyce Grinnell at Pasadena Calif., in April, 

 1909. This species, with setosa and pata, constitutes a 

 group of smaller forms more characteristic of the southern 

 portion of the state. Of these, pata may be distinguished 

 by its small round eyes, setosa by the long stiff fuscous vesti- 

 ture and black legs, and sita by its soft white vestiture and 

 castaneous legs. 



Holotype, male, No. 805, and allotype, female, No. 806, 

 Mus. Calif. Acad. Sci. ; paratypes in Academy's collection, 

 also in that of the author. 



Type locality, Foster, San Diego Co., Calif. 



7. Irbisia paeta, new species 



Polished black, coarsely punctate on pronotum; vestiture 

 long, soft, white; eyes small, but little elongated; legs ful- 

 vous. Length S l / 2 mm. 



