176 CALIFORNIA ACADEMY OF SCIENCES. 



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

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

 slightly in 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- 

 cuat:-, distinct, impressed channel; also at the bass near each basal angle, 

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

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

 one-third the length from the base; humeri longitudinally slightly prominent; 

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

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

 Legs long, slender. Length 2.2 mm. 



Nevada; (Reno, Washoe Co., 1). 



This species is closely allied to mendoclno\w(\. agrees with 

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

 so in the antennas; it, however, differs in the form of the 

 head and prothorax, the lateral channels of the latter being 

 more broadly arcuate in the present species. The basal 

 segment of the abdomen in mendocbio has two very short 

 rudimentary carinee not one-half as long as in zephyrinus, 

 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 n- sp. — Eather slender, convex, very dark' rufo-piceous; 

 legs and antennae 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; antennae 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 as the three preceding together, conoidal at base, very obliquely 

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

 th^ 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 



