Coleopterological Notices. 61 



ing together. Prothorax about one-fifth wider than long, scarcely narrower 

 than the base of the elytra ; sides in anterior two-thirds parallel and feebly 

 arcuate, then convergent and feebly sinuate to the basal angles, which are 

 obtuse, extremely narrowly rounded but not prominent ; lateral angles very 

 obtuse but narrowly rounded and rather distinct when viewed sublaterally, 

 less distinct vertically, apical nearly right, slightly but distinctly rounded ; 

 apex two-fifths wider than the base, botli subtruncate ; disk ratlier strongly 

 convex, rather finely but deeply, distinctly and not very densely punctate ; 

 pubescence sparse, moderate in length ; median groove very wide, deeply ex- 

 cavated and extremely conspicuous. Elytra quadrate, one-third longer and 

 wider than the prothorax ; sides feebly arcuate toward apex ; disk sparsely 

 punctate, the punctures feebly impressed, distant by twice their own diameters 

 and about as sparse as those of the pronotum ; pubescence fine, rather long 

 and sparse. Abdomen very slightly narrower than the elytra and very much 

 wider than the prothorax, finely, sparsely punctate, somewhat coarsely and 

 sparsely so beneath. Length 2.5-3.0 mm. 



California (Mendocino, Sonoma, and Santa Cruz Cos.). 



This species is allied only to gentilis, which it somewhat strongly 

 resembles in external form, color and lustre. It is, however, a 

 rather smaller species, with much sparser elytral punctuation, and 

 much deeper and wider median groove of the pronotum. The men- 

 turn is not impressed in the middle as in gentilis. 



The hypomera are nearly one-half as wide as the distance thence 

 to the coxae and are flat, except externally and posteriorly near the 

 lateral margin, where they are narrowly impressed ; the sutures are 

 distinct, and the coxal fissures long and widely open. 



B. stabilis n. sp. — Rather robust and depressed, widest at tlie elytra, 

 black ; elytra dark rufo-piceous to piceous-black ; legs, and antennae toward 

 base pale flavo-testaoeous, the latter infuseate toward apex ; head and pronotum 

 feebly shining, densely and somewhat coarsely granulose ; abdomen polished, 

 finely and evenly reticulate. Head very distinctly narrower than the protho- 

 rax ; eyes large ; surface feebly convex, not tuberculate, the median fovea 

 rather large and feeble but distinct ; antennal prominences feeble ; suture 

 very fine and nearly obsolete ; antennaj moderate, gradually incrassate ; second 

 joint rather shorter than the next two combined, tenth fully one-half wider 

 than long. ProthoTax nearly as wide as the base of the elytra, fully one-third 

 wider than long ; sides in anterior two-thirds parallel and very feebly arcuate, 

 then convergent, arcuate, feebly sinuate near the basal angles, which are 

 obtuse, not rounded and distinct, lateral broadly rounded and not very distinct, 

 apical right and narrowly rounded ; apex one-third wider than the base, both 

 just visibly arcuate ; disk finely, sparsely punctate, the punctures rather deep 

 and distinct ; median groove fine but distinct. Elytra large, toward apex, one- 

 fourth wider than the prothorax, nearly two-thirds longer ; sides feebly diver- 

 gent and nearly straight ; surface impressed on the suture at the base, deeply, 



