resting species, which he caught at Kaign's 

 Point, in the vicinity of Philadelphia. The in- 

 sects of this genus vary much in their sculpture, 

 size and colour, w^hich renders it difficult to dis- 

 tinguish the species, of vs^hich we seem to have 

 several. In the above description I have pur- 

 posely avoided a minute detail of colours and 

 markings, noting such only as w^ill probably 

 prove to be permanent, or nearly so, and charac- 

 teristic of the species. 



The left hand figures of the plate ; natural 

 size and magnified. 



ACRYDIUM LATERALE. 



SPECIFIC CHARACTER. 



Pale brownish-testaceous, with a lateral broad 

 fuscous line ; thorax shorter than the wings. 



DESCRIPTION. 



Vertex with an elevated longitudinal line, com- 

 mencing near the tip, and extending down over 



PLATE V. 



