16 DESCBIPTION OF INSECTS 



Length three-fourths of an inch. 



Body with very short dense hairs. 



Head black ; front with two indented lines ; vertex with an 

 obsolete rufous spot ; antennae testaceous ; second, third, 

 fourth, and tip of the first joints black ; palpi testaceous. 



Thorax and feet ferruginous. 



Elytra black-blue opake ; about eight distant, acute, impunc- 

 tured strife. 



Very common under stones, ^'c. in various parts of the 

 United States, and in Florida. Found also by Mr. Nuttall 

 on the Missouri. 



Genus Odacantha. Fahr. 



Anterior tibia emarginate ; elytra truncated at tip ; head at- 

 tenuated behind ; palpi filiform ; tongue exserted, coria- 

 ceous in the middle, and membranaceous each side. 



Species. 



!• 0. Pennsylvanica black ; elytra rufons, with punctured 

 striae at the base ; marginal spot, sutural spot and tip, black. 



Agra Pennsylvanica. Edinb. Encyc. 



Drypla Pennsylvanica. Lamarck. Jin. San. Vert. IK, p. 505. 



Body with a few distant hairs. 



Head black, destitute of punctures, polished ; antennae, four 

 basal joints rufous. 



Thorax black, with excavated punctures each side, which 

 disappear near the tips ; a longitudinal impressed line each 

 side above. 



Feet pale testaceous ; knees dusky or black ; tarsi, penul- 

 timate joint entire. 



Elytra rufous, striate with punctures which are obsolete be- 

 hind the middle ; a large, common, longitudinally ol)long- 

 oval, black spot on the middle, and common, ti ansverse, 

 terminal, larger one, which is connected by the black hind 



