AMERICAN PHILOSOPHICAL SOCIETY. 587 



_ 7. A. PROPERA. — Blackish ; thorax depressed on the posterior 

 middle. 



Inhabits Indiana. 



Body with very numerous small punctures, furnishing pale 

 yellowish hairs ; antennae black fuscous, three or four basal joints 

 piceous ; mouth piceous ; thorax black piceous, conspicuously 

 hairy; on the middle of the base indented; elytra piceous brown, 

 obviously hairy, a little depressed on the basal margin and in the 

 region of the scutel ; tergum black ; feet pale piceous. 



Length over or about one-tenth of an inch. 



The depression, almost or quite amounting to an indentation 

 at the base of the thorax is sometimes geminate. 



8. A. SEMICARINATA. — Blackish ; thorax with a carina on the 

 basal half. 



Inhabits Missouri. 



Body black with a piceous tinge ; thorax with an elevated line 

 or two parallel impressed striae, from the middle to the base ; 

 elytra with a slightly impressed sutural groove on the basal half; 

 abdomen black; feet pale piceous. [471] 



[Continuation from Vol. VI. N. S., 1836, pp. 155-190.] 



9. *A. SIMPLICICOLLIS. — Blackish; antennse, feet, inner tip of 

 the elytra and posterior margins of the segments of the tergum 

 reddish-brown. 



Inhabits Missouri. 



Body with short prostrate hairs ; head black ; antennae reddish- 

 brown ; transverse joint somewhat darker; elytra on the sutural 

 margin, particularly towards the tip, obscure reddish-brown ; 

 common emargination at tip very obvious : tergum with the pos- . 



*In the description of tlie preceding species {A. semicarinata see Vol. 

 IV. N. S., p. 470,) the following details were accidentally omitted :— 



Length less than one-tenth of an inch. 



Resembles A. propera, but may be distinguished by the double tho- 

 racic groove, forming an inclined carina. 

 1836.] 



