44 Coleopterological Notices. 



tubercles of the front and epistoma being rudimentary. The hypo- 

 niera are very feebly impressed along the outer margin ; they are 

 wide, and the apical width is equal to the length of the short, almost 

 completely closed coxal fissures, and two-thirds as wide as the 

 width at the fissures; the suture is obsolete, but traceable from 

 differences in the form of reticulation. The mentum is distinctly 

 but moderately impressed throughout the width toward base, the 

 short coriaceous hypoglottis being separated by a fine deep suture. 



In the two following species only those characters are mentioned 

 which differ from the corresponding ones of armatus ; in other re- 

 spects they are similar. 



B. streilllUS n. sp. — Robust, moderately convex, black, the elytra some- 

 times dark piceo-rnfous as in armatus. Head much narrower than the protho- 

 rax ; epistomal suture very coarse, deep and distinct ; antennae piceous-black 

 throughout, nearly as in armatus. Prothorax slightly wider than the base of 

 the elytra, one-third wider than long ; sides in slightly more than apical two- 

 thirds nearly straight and very feebly but distinctly divergent from the apex, 

 then strongly convergent, at first nearly straight then broadly rounded into 

 the base, without trace of basal angles, the base more feebly arcuate ; lateral 

 angles obtuse but very narrowly rounded and distinct, apical very slightly 

 obtuse, rather narrowly but distinctly rounded ; apex transversely truncate ; 

 punctures rather more densely and evenly distributed than in armatus. Elijtra 

 very slightly wider than long, at apex scarcely perceptibly wider than the 

 jirothorax, the sides slightly divergent and nearly straight, between one-fourth 

 and one-third longer than the prothorax. Abdomen very slightly narrower 

 than the elytra. Length 6.0 mm. 



California. 



The description is taken from the male, of which I found a single 

 specimen in the brackish marsh behind the ocean beach at San 

 Francisco. There is an entirely similar specimen from the same 

 locality in the cabinet of Dr. LeConte. With these I have asso- 

 ciated a large number of specimens taken at Los Angeles, which 

 differ only in the sides of the prothorax being parallel and not diver- 

 gent from the apex as in the San Francisco specimens — they, how- 

 ever, probably represent a variety, as the coxal fissures are distinctly 

 shorter and more nearly closed. The species differs from armatus 

 in its much more transverse prothorax, rather more robust form, 

 and distinct lateral prothoracic angles. 



The hypomera are wide, very feebly impressed laterally, the apical 

 width being slightly more than one-half that at the coxal fissures; 

 the latter are longer than in armatus, being nearly as long as the 



