126 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



hind margin a little concave, leaving the basal lobe of the scu- 

 tellum moderately exposed. Elytra gradually widened almost 

 to the apex of the corium, the abdomen nearly attaining the 

 tip of the cuneus. Tibial bristles short and weak, concolorous 

 with the tibiae. Rostrum short, hardly attaining the base of 

 the intennediate coxae. 



Dextral hook of the male genitalia large, mushroom- 

 shaped, with its distal margin oblique and parallel with the 

 edge of the segment, its apicies rounded; sinistral hook linear 

 and strongly incurved ; both hooks pale. 



Color brownish-fuscous, becoming black on the front of 

 the head and along either side of the body beneath. Base of 

 the vertex, an elongated spot against the inner margin of each 

 eye and the median line pale or greenish. Anterior margin of 

 the pronotum before the callosities and the middle of the pos- 

 terior disk pale or greenish, the anterior margin sometimes 

 tinged with ferruginous. Median vitta of the scutellum pale 

 or somewhat ferruginous. Commissural and costal nervures 

 slenderly pale ; a pale ray on the base of the corium within 

 the costa extending a little beyond the tip of the scutellum, 

 and a less conspicuous commissural mark from the tip of the 

 clavus to the base of the membrane; incisure at base of the 

 cuneus pale. Membrane deeply infuscated with its nervures 

 pale and with a whitish mark against the apex of the cuneus. 

 Antennae black. Rostrum and legs brownish-testaceous, the 

 tarsi becoming black. Beneath black and polished with a 

 broad indefinite whitish median vitta extending as far as the 

 genital segment. 



Described from one male taken on Mt. Washington, N. H., 

 by Mrs. Annie Trumbull Slosson; a female taken on Mt. 

 Washington, July 5, 1914, and sent to me by Mr. H. H. 

 Knight; a female taken by me at Bretton Woods at the foot 

 of Mt. Washington, June 30, 1909; and another taken at 

 Spring Brook, near Buffalo, N. Y., June 25, 1911. The large 

 size and dark brown color of this species will readily distin- 

 guish it. In the male the basal pale ray on the corium is con- 

 siderably extended. 



Type, male, in collection of Mrs. A. T. Slosson. Allotype, 

 female, in collection of the author. Paratypes in Museum of 



