OBSERVATIONS. 



One individual only, occurred to Major Long's 

 exploring party, near the base of the Rocky 

 Mountains. It is widely distinct from the pre- 

 ceding species. 



The lovs^er right figure. 



LYCUS PERFACETUS. 



SPECIFIC CHARACTER. 



Black ; thorax each side rufous ; elytra striate. 



DESCRIPTION. 



Body deep black : head polished, vs^ith a deeply 

 impressed longitudinal line : antennae opake, com- 

 pressed, a little serrated ; second joint more than 

 half the length of the third, vrhich is as long as 

 the fourth, though less dilated : thorax somevs^hat 

 unequal, polished black, with broad rufous lateral 

 margins ; an impressed longitudinal line ; posterior 

 angles acute : elytra with slightly impressed striiT, 



PLATE XXI. 



