650 Coleopterological Notices, IV. 



oval, with less prominent and especially less post-basal humeri, and 

 the small, slender tarsal claws are more widely divergent. 



The four representatives here recognized may be easily identified 

 from the following characters, the species being more isolated among 

 themselves than in Stethobaris : — 



Elytra without dispersed squamules, the antennal scape more abruptly clavate. 

 Antennae with the first funicular joint not longer than the next three to- 

 gether ; club smaller, with its basal joint constituting about one-half of 

 the mass ; vestiture not dense at the sides beneath. 

 Sculpture coarse, the pronotum with a narrow, impunctate and generally 

 subcarinate line ; interstitial punctures of the elytra coarse and deep ; 



larger species 1 tubulatus 



Sculpture finer, the pronotum very finely, densely rugulose and without 

 median line ; interstitial punctures smaller, rather indefinite and feeble ; 



much smaller species 2 subcalVUS 



Antennae with the first funicular joint as Ions? as the next four ; club larger, 

 elongate, nearly as long as the preceding six joints combined and with its 

 basal joint constituting but slightly more than one-third of the mass ; vesti- 

 ture extremely dense at the sides of the body beneath. ..3 ellipsoideilS 

 Elytra with widely dispersed, longer, whiter but slender squamules ; antennal 

 scape gradually clavate 4 dispersus 



1 Idiostethus tllblllatus Say — Cure, p. 20; Ed. Lee, I, p. 285 

 (Camptorhinus — Say, Stethobaris — Lee). 



Oval, rather robust, moderately convex, black, the antennae, tibiae 

 and tarsi piceous; integuments polished, the vestiture very sparse, 

 consisting of short, slender, subrecumbent setae, generally more 

 evident toward the sides of the prothorax, and in a single line 

 along each elytral interval. Beak slender, strongly arcuate, about 

 one-half longer than the prothorax, rather densely, strongly punc- 

 tate; antennas inserted a little beyond the middle, with the scape 

 abruptly clavate, the second funicular joint not quite as long as the 

 next two, the club moderate, elongate-oval, rather abrupt, nearly as 

 long as the five preceding joints combined, and with the basal joint 

 constituting almost one-half the mass. Prothorax nearly three- 

 fourths wider than long, the sides rather strongly convergent and 

 straight to apical third, then broadly rounded and convergent to 

 the strongly constricted and tubulate apex; punctures coarse, deep, 

 rather dense, more or less longitudinally confluent, and with a nar- 

 row subcarinate impunctate line. Scutellum small, slightly wider 

 than long, broadly emarginate at apex. Elytra abruptly much 

 wider than the prothorax and fully two and one-half times as long, 



