not divided at the suture, prominently carinate 

 each side, and emhracing the sides of the abdo- 

 men; tarsi with the three basal joints of the 

 anterior feet a little dilated in the male. 



OBSERVATIONS. 



Separated by Latreille, from the genus Cy- 

 CHRus, and consisting as yet, of a single species 

 only, though Dejean supposes that the Cychrus 

 unicolor of Fabricius, will constitute a second 

 species, but the latter does not appear to be at 

 present known to entomologists. This genus is 

 most closely allied to Cychrus and SpHiERo- 

 DERUS, but particularly to the former; the 

 thorax, however, is of a different form, and 

 the anterior tarsi of the male are a little 

 dilated. 



We remarked in our Preface, p. vi. that 

 " care has been taken that species of different 

 genera be not represented in the same plate." 

 It seems therefore proper, that we should state 

 the reason why we have not complied with this 

 intention in the annexed plate, where three 

 genera are introduced. That plate was engraved 

 before the author left Philadelphia, on a visit 

 to New-Harmony, Indiana, his present residence, 



PLATE 45. 



