04 Coleopterological Notices. 



and coarse!}" punctate, and the hypomera are wider and almost 

 perfecth' flat, the sutures more distinct. 



B. bicolor n. sp. — Black ; protliorax, elytra and antennae brown ; legs 

 flavate ; head and pronotum very finely, densely granulate and opacjue ; elytra 

 and abdomen polished, the latter reticulate. Head just visibly narrower than 

 the protliorax ; eyes rather large but moderately prominent, the set* 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 

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

 Piothorax very slightly narrower ihan the base of the elytra, scarcely one-third 

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

 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 

 Avider than the base, both subtruncate ; disk finely and rather densely i)unc- 

 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 protliorax, very slightly wider toward apex ; sides nearly 

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

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

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

 distinct. Ahdnvien 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 (Xapa Co.). 



A rather small inconspicuous species, allied to rvficorms, but 

 well distinguished by its peculiar coloration, which is very constant 

 throughout a series of eight specimens. It is further distinguished 

 Ijy its sexual characters, the anterior margin of the epistoma being 

 perfectly devoid of tuberculation in the male. In the corrcsjionding 

 sex of riifu'07-nis there are two remote and very small tubercula- 

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

 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 coxas, the sutures being distinct. The 

 coxal fissures are very widely open. The nientum is exceedingly 

 feebly concave, the hypoglottis apparently obsolete. 



