544 TRANSACTIONS OF THE 



puncturing of the elytra. I have two specimens, both of which 

 are mutilated, so that I am not perfectly sure it belongs to this 

 genus. 



[This is probably Notlwpiis zahroides Lee. formerly described 

 by me as Euryderus zahroides, but the description is hardly 

 sufficient. — Leg.] 



DAPTUS Dej. 



D. INCRASSATUS Dcj. — This insect appears to be rare. — I ob- 

 tained an individual in Pennsylvania. It has not yet occurred 

 to me in the western States. 



[The type of Geop{7ius Lee. — Leg.] 



CR AT ACANTHUS Dej. 

 C. PENSYLVANicus Dej., is a common insect. — But it is not 

 confined to Pennsylvania, as the name would seem to imply ; it 

 is abundant in this state, and I obtained three specimens near 

 the Rocky Mountains ; [431] these are somewhat smaller than 

 the inhabitants of this vicinity, and of a paler color. 



PANGUS Zeigl. 



P. CALIGINOSUS Fabr. — Dejean refers this large species to 

 Pangxis, which he makes a division of his genus Sclenopliorns. 



ANISODACTYLUS Dej. 



1. A. DTLATATUS. — Black; thorax transverse quadrate, not 

 contracted behind; impunctured; first joint of the antennae tes- 

 taceous. 



Inhabits Mexico. 



Body black, impunctured ; antennae not reaching the base of 

 the thorax; first joint pale testaceous, second joint darker, re- 

 maining joints blackish; impressed frontal lines very distinct ; 

 thorax without any appearance of puncture, not narrowed behind ; 

 lateral edge regularly arquated ; posterior angles rounded ; dorsal 

 line not very obvious ; basal indentations much dilated, not pro- 

 found ; minute longitudinal lines or wrinkles at the middle of the 

 base, and less obvious ones on the anterior margin ; elytra, striae 

 profound, impunctured; interstitial spaces depressed; tip very 



1834.] 



