Coleopterological Notices, IV. 649 



humeri rather prominent; stride rather coarse, deep, abrupt, one-half 

 to two times wider than the grooves, each with an uneven single 

 series of small, not very close-set punctures, more confused on 

 the third. Abdomen closely, rather coarsely punctate, the fifth 

 segment not as long as the two preceding, the pygidium slightly 

 exposed at tip in the male. Length 2.3 mm.; width 1.2 mm. 



Florida (Enterprise). Cab. LeConte. Represented by the unique 

 male type. The presternum is flat, the subapical constriction fine, 

 even and continuous entirely across the surface and not obsolete at 

 the middle as stated by LeConte ; the surface between the constric- 

 tion and the apex being rather strongly reflexed over the basal part 

 of the head, the author quoted quite pardonably mistook the groove 

 for the apical margin. The anterior coxte are separated by dis- 

 tinctly less than one-half (jf their own width. The legs are more 

 slender than in 3Iicrocholus striatus, but the tarsal claws are very 

 nearly similar, thick and approximate, though divergent and free at 

 base. 



IDIOSTETHUS n. gen. 



This genus, though related to Stethobaris, is conspicuously dis- 

 tinct in antennal and pectoral structure, as well as in the general 

 nature of the sculpture and vestiture. The antenna have the 

 second funicular joint elongate when compared with that of Stetho- 

 baris, and the club is generally smaller than in that genus; the club 

 varies, however, quite remarkably in size and structure. 



The prosternum is noticeably tumid, especially before the coxjb, 

 reminding us in this respect of Orthoris, and the narrow, deep but 

 not abruptly defined median canaiiculation is formed in much the 

 same manner, as a depression between the ante-coxal prominences. 

 The coxiE are much more approximate than in Stethobaris, never 

 being separated by more, and generally by less, than one-third of 

 their own width. The pronotal sculpture is always in greater or 

 less part longitudinally rugulose, and the vestiture con.sists of small 

 sparse slender and recumbent seta? and squamules, the latter, in one 

 of the species, widely dispersed over the elytra; they are generally, 

 but not always, more distinct toward the sides of the body beneath, 

 occasionally becoming conspicuously dense. 



In the short tubulate prothorax, structure of the beak, mandibles 

 and transverse frontal impression, scutellum, legs and tarsi, Idio- 

 stethus closely resembles Stethobaris, but the body is more elongate- 



