\^ 



152 



Say^s Descriptions of new 



the characterSj nearly corresponds with this species ; but 

 as the head is deficient in the specimen^ I cannot deter- 

 mine positively; and, furthermore^ the circumstance of 



F 



the 2d and 4th elytral costae not being obviously ele- 

 vated, leads to a doubt. 



Sandalus, Knoch. 



V 



I. 



1. S. petrophy a y Knoch. I observed this insect, fre- 

 quently, on the flowers of a resinous plant common in 

 the prairies of Missouri. 



2. S. ? hrunneus. Blackish-brown ; antennae sericeous- 

 brown ; thorax with two indentations on the disk. 



I 



Inhabits Indiana. 



Body blackish-brown, punctured, oblong : head with 

 small punctures, rather prominent between the antennae, 

 above which it is somewhat indented : antennce as long 

 as the thorax or rather longer, brown sericeous: thorax 

 with small punctures, anterior and posterior angles denti- 

 form ; disk with a small orbicular indentation each side 



igul 



basal 



middle ; posterior margin each side of the middle a little 

 concave : scutel orbicular : elytra with numerous some- 

 what large punctures, not in striae, with four slightly 

 elevated lines or nervures, the inner one abbreviated be- 

 fore the tip, the others confluent near the tips. 



Length from two fifths to three fifths of an inch. 



This insect approaches, in character, nearer to Sanda- 

 lus than to any other genus. In that genus the mandi- 

 bles are remarkably falcate, and the tooth is on the inner 

 side, towards the base; they are also covered to the mid- 

 dle by a membrane or coriaceous process ; the tibiae are 

 quadrilateral and denticulate, and the tarsi beneath, are 



*.-; 



