OBSERVATIONS. 



One individual only, occurred to Major Long's 

 exploring party, near the base of the Rocky 

 Mountains. It is w^idely distinct from the pre- 

 ceding species. 



The lower right figure. 



LYCUS PERFACETUS. 



SPECIFIC CHARACTER. 



Black 5 thorax each side rufous ; elytra striate. 



DESCRIPTION. 



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

 impressed longitudinal line : antenrm opake, com- 

 pressed, a little serrated ; second joint more than 

 half the length of the third, w^hich is as long as 

 the fourth, though less dilated : thorax somevs^hat 

 unequal, polished black, vs^ith broad rufous lateral 

 margins ; an impressed longitudinal line ; posterior 

 angles acute : elytra w^ith slightly impressed striae, 



PLATE XXI. 



