Goleopterological Notices^ VII. 323 



the usual moderate angular nick ; supra-orbital ridges fine, stronger at the an- 

 tennae but nottuberculiform ; antennje % as long as the body, slender, feebly 

 thickened basally, the first joint elongate, obconic, much shorter than the next 

 two and distinctly stouter, the seta between apical fifth and sixth. Prothorax 

 relatively rather large and well developed, a little wider than long, strongly di- 

 lated and broadly, circularly arcuate anteriorly, constricted at basal sixth, the 

 sides thence straight and slightly divergent to the base, the latter fully % 

 the maximum width but not as wide as the head ; angles a little less than 

 right and quite blunt ; disk feebly convex, the impressions slight ; reflexed 

 side margins quite strong and deep. Elytra evenly elliptical, evenly and mod- 

 erately convex, fully % longer than wide, 3 times as long as the prothorax 

 and about 2^% times as wide, moderately full at the humeri, the reflexed side 

 margins distinct ; disk rather finely and evenly striate, the striae deeply im- 

 pressed and quite coarsely and closely punctured, distinctly crenulating the 

 intervals, which are convex, without trace of supplementary punctures and 

 perfectly even almost to the side margins. Length 18.0 mm. ; width 8.2 mm. 



California (exact locality not recorded). 



This species is allied to the preceding, differing in its relatively 

 larger, more inflated and constricted prothorax and more coarsely 

 but equally evenly sculptured elytra. The pubescent pad of the 

 first anterior tarsal joint of the male occupies barely apical half. 



The acarids infesting this genus are extremely minute, if the 

 numerous examples which I have seen are full}'^ matured. One 

 noted on the present species is narrowly oval and barely a fourth 

 as long as the second anterior tarsal joint. The same species in- 

 fests several other widel}' different species of Brennus, and the 

 acarid is probably peculiar to this genus. 



18. B. mimus Horn— Trans. Am. Ent. Soc, 1874, p. 20; 1. c. : 1878, 

 p. 182. 



Moderately elongate, black, shining. Head moderatel}' elon- 

 gate, subopaque ; gense feebly notched. Prothorax cordiform, as 

 wide as long; sides in front moderately arcuate, posteriorly 

 slightly sinuate ; hind angles rectangular ; margin A'ery narrow ; 

 disk flat, opaque; impressions feeble. Elytra oval, moderately 

 ventricose ; surface finely striate; strife not impressed but with 

 large, moderately closely placed punctures ; intervals irregular 

 at the sides ; inflexed portion obsoletely punctate. Body be- 

 neath smooth, shining. Length 14.5-16 mm. [Horn.] 



California (San Bei'nardino). This species is said to be very 

 similar to punctatus in general appearance, but with the elytra 

 rather less ventricose and differing in male sexual characters, as 

 indicated in the table. It is unknown to me in nature. 



