OBSERTATIONS. 



This large and fine species is not uncommon 

 in various parts of the Union, at least from Penn- 

 sylvania to the southern boundary. Its puncture 

 is very painful, benumbing the vicinity of the 

 wounded part, for a considerable time. 



Its great similarity to the R. cristatus of South 

 America, has hitherto induced entomologists to 

 identify it with that species ; but having carefully 

 considered their respective characters, I am of 

 opinion that they are distinct, though certainly 

 very closely allied. The cristatus has at least 

 twelve denticulations to its crest, and its pale 

 rufous tibiae, strongly contrast with the femoral 

 colour. 



The upper right figure of the plate. 



REDUVIUS CRASSIPES. 



SPECIFIC CHARACTER. 



Blackish ; thorax and abdomen margined with 

 reddish ; feet thick. 



PLATE XXXI. 



