COLEOPTERA. 311 



males are dilated, but slightly, and in the form of a palette, and in 

 which the thorax forms a trapezium, wide, emarginated at both ends, 

 with the sides turned up, and with acute and recurved posterior 

 angles, constitute another generic section, that of 



Scaphinotus, Lat. Dej.(l) 



Finally, other species resembling the Cychri, but in which the two 

 first joints of the anterior tarsi of the males are greatly dilated, and 

 form a patella with the third, which is less so, and cordiform, con- 

 stitute the 



SphjEroderus, Dej.(2) 



The species of these two last subgenera are peculiar to America. 



In the second division of this section, we find Carabici with a 

 thick body, and most commonly apterous, like the preceding, but in 

 which the middle of the emargination of the mentum is provided 

 with an entire or bifid tooth, and where the mandibles are, at most, 

 armed with one or two teeth, situated at their base. 



The thorax is always in the form of a truncated heart. The abdo- 

 men is most frequently oval. 



Some of them, in which the labrum is occasionally entire, have 

 all the tarsi identical in both sexes. 



Tefflus, Leach. 



The Teffli are the only ones of this division in which the labrum 

 is entire or unemarginate. 



T. Megerle; Carabus Megerlei, Fab.; Voet., Col. II, xxxix, 

 49. Nearly two inches in length; all black; thorax rugose; 

 elytra divided by longitudinal ribs with elevated points in their 

 sulci, last joint of the exterior palpi very large, elongated and 

 securiform, the internal edge curvilinear; tooth in the emargi- 

 nation of the mentum small; third joint of the antennae at least 

 thrice the length of the second. 



Procerus, Meg. 



The labrum bilobate. All the known species are large, entirely 

 black, or black underneath, and blue or greenish above with ex- 



C. italicus, Bonel., Obs. Entom., Mem. of the Acad, of Tur. See Dej. Spec.II, 

 p. 4, et seq. [Am. species, C. viduus, Say. Am. Ed.] 



(1) Cychrus elevatus, Fab.; Knoch, Beytr., I, viii, 12; Dej. Spec. II, p. 17, 

 et seq. 



(2) Dej. Spec. II, p. 14, et seq. 



