COLEOPTERA. 303 



The last of the Simplicimani are distinguished from all the others 

 by the internal dentations of the terminal hooks of their tarsi. 



All the exterior palpi, of some, are filiform j their thorax is either 

 in the form of a heart, narrowed and truncated posteriorly, or in 

 that of a trapezium widening from before backwards. 



Ctenipus, Lat.(l) — Loemosthenus, Bon. 



The body straight and elongated, thorax cordiform, narrowed and 

 truncated posteriorly; third joint of the antennas elongated 2). 



Calathus, Bon. 



The body oval and arcuated above; thorax square or trapezoidal, 

 wider posteriorly(3). 



The labial palpi of the others have a clavate term'ination, in the 

 form of a top or reversed cone, and a nearly orbicular thorax. 



Taphria, Bon. — Synuchus, Gyll. 



Emargination of the mentum bidentate, as in the preceding sub- 



genera(4}. 



5. The fifth section, that of the Patellimani, is only distinguished 

 from the fourth, by the manner in which the two anterior tarsi of the 

 •males are dilated; the first joints — usually the three first, then the 

 fourth, and sometimes only the two first — all of which are sometimes 

 square, and at others only in part, the remainder being cordiform, 

 or resembling a reversed triangle, but always rounded at their extre- 

 mity, and not terminated as in the preceding sections by acute an- 

 gles, form an orbicular palette or long square, the inferior surface of 

 which is usually furnished with brushes or crowded papillae, without 

 any intermediate vacancy. 



The legs are generally slender and elongated, and the thorax is 

 frequently narrower than the abdomen, throughout its whole length. 



(1) Formerly Ctekipus, Lat., who recommends the substitution of the above 

 name for his own, as we have already the genus Ctenopus. Am. Ed. 



(2) The Sphodri janthinus, complanatus, and several others of count Dejean, 

 which are distinguished from the true Sphodri by the abbreviation of the third 

 joint of the antennae, and by the dentations of the hooks of the tarsi. These two 

 subgenera are almost insensibly confounded with each other. M. Fischer has 

 figured several species of both under the generic appellation of Sphodrus in his 

 Entom. lluss. Vol. 11. 



(3) Carabus melanocephalus. Fab.; Panz., Faun. Insect. Germ. XXX, 19; — C. 

 cisteloides, lb., XI, 12; — C.fuscus, Fab. ; — C. frigidus. Id. See the Catalogue, &c. 

 I)ej., and the Insect. Spec. Nov., Germar, I, p. 13. 



(4) Carabus rivalis, lllig.; Panz. lb. XXXVII, 19. 



