176 CALIFORNIA ACADEMY OF SCIENCES. [20] 



base a very deep, rounded, nude median fovea, continued anteriorly by a 

 narrow, feebly impressed groove to within one-third the length of the apex; 

 slightly iu advance of the fovea, nearly midway between it and each side, a 

 rather acute tubercle; between the latter and the edge a moderate, irregular, 

 deeply impressed fovea, connected with the median by a feebly impressed, 

 anteriorly arcuate line, and each continued anteriorly by an outwardly ar- 

 cuate, distinct, impressed channel; also at the base near each basal angle, 

 two small, deeply impressed foveas. Elytra very minutely, sparsely punctate, 

 convex; discal stria in the form of a broad impression, becoming extinct at 

 one-third the length from theba.e; humeri longitudinally slightly prominent; 

 each elytron with three fovea; at base. Abdomen very finely, sparsely punc- 

 tate; basal segment with two short, approximate, parallel carinas at base. 

 Legs long, slender. Length 2.2 mm. 



Nevada; (Keno, "Washoe Co., 1). 



This species is closely allied to mendocino and agrees with 

 it in the form of the elytra, abdomen and legs, and nearly 

 so in the antenna?; it, however, differs in the form of the 

 head and prothorax, the lateral channels of the latter being 

 more broadly arcnate in the present species. The basal 

 segment of the abdomen in mendocino has two very short 

 rudimentary carinas not one-half as long as in zephyrimis, 

 and the sexual characters differ; in the present species the 

 abdomen has on the under surface, near the apex, a large 

 deeply impressed fovea, as wide as long, which is emargi- 

 nate anteriorly, the notch being in the form of a very broad 

 cusp. 



B. speculum u- sp. — Rather slender, convex, very dark" rufo-piceous; 

 legs and antenna; paler, dark rufous, the latter paler at apex; abdomen pi- 

 ceous-black; integuments highly polished; pubescence rather coarse, sub- 

 erect, sparse. Head slightly longer than wide; eyes small; sides strongly 

 convergent, distinctly arcuate to the neck; the latter much less than one- 

 half as wide as the width at the eyes; surface feebly convex, impunctate; 

 autennal tuberculations not punctate; antennas long, slender, longer than 

 the head and prothorax together; eighth joint slightly longer than wide, 

 ninth and tenth equal in length, rounded, the former nearly as long as 

 wide, the latter very slightly wider than long, eleventh wider than the tenth, 

 no: as long a* the three preceding together, conoidal at base, very obliquely 

 pointed. Prothorax widest at slightly more than one-third the length from 

 the apex, where it is as wide as the head, very slightly longer than wide; 

 sides feebly sinuate posteriorly to the base, which is three-fourths as wide 



