330 Goleopterological Notices, VII. 



under surface of the fourth joint, but the spiniform setae are 

 longer and denser. The intercoxal plate of the mesosternum is 

 abruptly narrowed and elevated anteriorly and with the usual 

 deep posterior emargination. The female is larger but differs ex- 

 tremel}^ little in general form, the elj'tra being but slightly more 

 inflated, though relativel}' much larger when compared with the 

 prothorax in ever}^ dimension. 



I am not certain that this is the true dissolutus of Schaum, but 

 it answers the description somewhat better than any other species 

 before me. 



27. B. Sinuatus n. sp. — Eather strongly ventricose and only moderately 

 elongate, polished ; head and prothorax very feebly alutaceous, the convex por- 

 tions of the latter polished ; body deep black, the pronotum near the sides and 

 concave elytral margins distinctly violaceous. Head moderately stout and 

 elongate, the vertex virtually smooth ; genfe feebly developed, with the nick 

 small and angulate ; supra-orbital ridges fine, strong anteriorly where the 

 inner slope is quite gradual ; antennae scarcely % as long as the body, slender, 

 scarcely thicker basally, the first joint only slightly stouter, obviously shorter 

 than the next two, the seta fully at apical sixth. Prothorax relatively mod- 

 erate in size, as long as wide, strongly inflated, with the sides rounded an- 

 teriorly, strongly oblique and nearly straight thence to the subbasal sinua- 

 tion, becoming parallel and straight in basal fifth or sixth ; angles right : base 

 }4 the maximum width but scarcely as wide as the head ; disk feebly but dis- 

 tinctly convex, the impressions fine though distinct ; reflexed margins mod- 

 erate. Elytra subelliptical, notably full at the strongly rounded humeri and 

 quite pointed at apex, slightly more than ^3'' longer than wide, about 3 times 

 as long as the prothorax and 2% times as wide, the reflexed margin moderate, 

 with coarse and widely spaced punctures ; disk rather strongly convex, with 

 deep and widely impressed striae which are rather coarsely but unevenly punc- 

 tured ; intervals convex, frequently more or less completely interrupted to- 

 ward the suture and very much broken up laterally, the strise readily trace- 

 able, however, throughout. Length 16.5-18.0 mm. ; width 6.8-8.0 mm. 



California (locality unknown). 



The male here described represents a species closely allied to 

 dissolutus, but differing in its more inflated hind body and 

 relatively much smaller and less anteriorly dilated prothorax, 

 this not diflfering so much in relative size in the male and female ; 

 it also diflfers in having the elytral strise deeper and the intervals 

 more frequently interrupted throughout. The sexual characters 

 and mesosternal plate are nearly similar. The female is larger, 

 but only slightly more ventricose than the male. Three specimens. 



28. B. politiis n. sp. — Very nearly similar to sinuatus but smaller, with 

 less ventricose and less rugose elytra, and differing in the form of the pro- 



