654 Coleopterological Notices, IV. 



gent daws, deeply, abruptly and broadly excavated presternum, 

 not very widely separating the coxae, peculiar oval, thick and con- 

 vex form of the body, with prominent humeri situated at quite a 

 noticeable distance behind the base, and the polished black integu- 

 ments, Avhieh are practically entirely glabrous, each puncture bear- 

 ing an excessively minute seta, only visible under considerable 

 amplification. Stethobaris is one of the genera connecting the 

 more normal forms of the tribe with the aberrant Oomorphidius 

 and Eisonyx. 



The beak is separated from the head by a feeble but distinctly 

 marked transverse in]pression and is strongly arcuate, moderate in 

 length and thickness, and nearly always noticeably tapering from 

 base to apex, with the antennal scrobes strongly oblique and broadly 

 confluent beneath ; the mandibles are short, arcuate and broadly 

 decussate. The tibixe are deeply and longitudinally sculptured. 



The species of Stethobaris are moderately numerous, and, with 

 one exception, more than usually homogeneous in external appear- 

 ance. It is possible, however, that they may be recognized by the 

 characters given in the following table: — 



Integuments more or less finely and sparsely punctate, the interstitial punc- 

 tures of the elytra very minute and sparse. 

 Sides of the prothorax broadly arcuate, becoming parallel in basal half; 

 pronotal punctures minute and very sparse, becoming larger but not at 



all confluent at the sides beneath 1 corpulenta 



Sides convergent from the basal angles, the prothorax smaller and more 

 conical, less sparsely and more conspicuously punctured. 

 Prothorax with a distinct but narrow subentire impunctate line ; punc- 

 tures of the elytra confused, at least on the wider intervals ; sides 

 of the prothorax beneath obliquely and finely rugose ; last ventral 

 segment in both sexes distinctly shorter than the two preceding 

 together. 

 Elytral grooves very coarse, strongly, remotely punctured, the edges 

 feebly but distinctly serrato-crenulate ; form stouter, the prothorax 



a little more transverse 2 incoiupta 



Elytral grooves less coarse, much more finely punctate at the bottom, 

 the edges never serrato-crenulate, except occasionally very feebly so 



near the base 3 OTata. 



Prothorax more conical and more densely punctate, never with a clearly 

 defined entire impunctate line, the punctures beneath at the sides dis- 

 tinct, not forming elongate rugse ; elytral strije very coarse and remotely 

 but conspicuously punctured, the extremely minute interstitial punc- 

 tures forming a single line on each 4 congei'Iliaiia 



Integuments coarsely, densely punctured, the punctures of the elytra forming 

 a single deep coarse and confluent line on each interval 5 egregia 



