04 Coleopterological Notices. 



and coarse]}' punctate, and the h^^pomera are wider and almost 

 perfectly Hat, the sutures more distinct. 



B. bicoloi* 11. sp. — Black ; protliorax, elytra and antennse brown ; legs 

 flavate ; head and proiiotum very finely, densely granulate and opaque ; elytra 

 and abdomen polished, the latter reticulate. Head just visibly iiarrov?er than 

 the prothorax ; eyes rather large but moderately prominent, the setae rather 

 long ; surface rather convex, finely and not distinctly punctate, not tubercu- 

 late, the median fovea very small and feeble ; antennal prominences feeble ; 

 epistomal suture fine, not impressed ; antennae but feebly compressed, rather 

 strongly incrassate ; second joint much longer and more robust than the third, 

 but not as long as the next two, three to six subequal in width, decreasing 

 rapidly in length, the latter but slightly transverse, seven to ten gradually 

 Mitler, tlie former not very abruptly so, the latter one-half wider than long. 

 Protliorax very slightly narrower llian the base of the elytra, scarcely one-third 

 wider than long ; sides in apical three-fifths parallel and nearly straight, tlien 

 convergent and broadly, feebly sinuate to the basal angles, which are obtuse 

 but not rounded and not prominent ; lateral angles obtuse and rounded but 

 rather distinct, apical nearly right and narrowly rounded ; apex one-third 

 wider than the base, both subtruncate ; disk finely and rather densely punc- 

 tate, the punctures being very indistinct and scarcely at all impressed, the 

 pubescence fine, rather dense but dark and scarcely visible ; the median groove 

 very fine but distinct. Elytra nearly quadrate, one-third wider and one-half 

 longer than the prothorax, very slightly wider toward apex ; sides nearly 

 straight ; disk not impressed at base, densely and distinctly, but somewhat 

 coarsely punctate, the punctures separated by distinctly less than their own 

 diameters ; pubescence fine, moderate in length and density, cinereous and 

 distinct. Abdomen broad, but slightly narrower than the elytra and much 

 wider than the prothorax, finely, not densely punctate, more strongly and 

 somewhat densely so beneath. Length 3.3 mm. 



California (Napa Co.). 



A rather small inconspicuous species, allied to ruficorms, but 

 well distinguished by its peculiar coloration, which is very constant 

 throughout a series of eight specimens. It is further distinguished 

 l)y its sexual characters, the anterior margin of the epistoma being 

 perfectly devoid of tuberculation in the male. In the corresponding 

 sex of rvficornis there are two remote and very small tubercula- 

 tions which, however, are not at the apical angles as in armafus, 

 but distinctly nearer the middle. 



The hypomera are flat, except near the apex of the coxal fissures 

 where they are feebly impressed ; they are scarcely one-half as wide 

 as the distance thence to the coxae, the sutures being distinct. The 

 coxal fissures are very widely open. The nientum is exceedingly 

 feebly concave, the hypoglottis apparently obsolete. 



