Vol. XI] VAN DUZEE— NORTH AMERICAN GRASS-BUGS 149 



the foregoing I believe to be the true brachyceras Uhler. It 

 has the gray vestiture long and erect as described by Dr. 

 Uhler, the vertex flattened between the antennae, rostrum 

 and legs piceous, becoming castaneous on the tibiae, prosterum 

 concolorous, coxal cavities and orifices broadly ivory-white 

 and the dextral clasper short, scarcely surpassing ventral 

 aspect of genital segment. Another male of this form 

 was sent to me by Prof. Aldrich from Moscow, Idaho. In 

 both these species the membrane is uniformly infuscated. 



Holotype, male, No. 802, Mus. Calif. Acad. Sci. ; allotype 

 and paratypes in collection of the author. 



Type locality, Sunset, Colo., at 8000 feet elevation. 



5. Irbisia setosa, new species 



Polished black, coarsely punctured and somewhat bronzed 

 on the pronotum; vestiture of long erect fuscous hairs and 

 minute white appressed ones; legs mostly black. Length 

 5-6 mm. 



Head short, nearly vertical, produced beyond eyes for a space equal to 

 length of eye; eyes large, ovate, narrowed below; vertex flattened between 

 the antenna;; clypeus much incurved at apex; temporal areas prominent, sha- 

 greened. Segment II of antennae three times length of I ; III and IV equal, 

 together a little longer than II. Pronotum coarsely, distinctly punctate, 

 scarcely rugose; scutellum finely wrinkled; elytra roughened or obscurely 

 punctate. Vestiture of erect stiff black hairs as long as thickness of femora, 

 and very minute appressed white hairs. Beneath highly polished, black, with 

 scattering pale hairs along middle to apex of genital segment. Sinistral male 

 clasper broad and convex at base, curved and sickle-shaped, its acute apex 

 scarcely exceeding the dextral clasper. 



Color, deep black a little bronzed above, especially on pronotum; rostrum 

 and legs dark castaneous or almost black on femora, the tibiae paler, margins 

 of coxal cavities scarcely touched with white ; membrane uniformly infuscated. 



Described from one pair taken by me at Cazadero, So- 

 noma Co., Calif., April 12-14, 1918; another pair taken 

 by me at Bradley, Monterey Co., Calif., April 23, 1917; 

 one male taken at Fairfax, Marin Co., Calif., May 7, 1919; 

 and two males from the hills back of Oakland, Calif., taken 

 May 12, 1908, by Dr. E. C. Van Dyke. This form may 

 be distinguished by the long erect fuscous vestiture, which, 

 however, is easily rubbed off, the short vertical head, black 

 legs and male genital characters. 



Holotype, male, No. 803, and allotype, female, No. 804, 

 Mus. Calif. Acad. Sci. 



