NATURAL SCIENCES OP PHILADELPHIA. 151 



canthacris, for no otlier reason, so far as I can see, than that the prosternal 

 spine approaches the border of the mesosternum. Although it differs 

 slightly from the typical species of Caloptenus, yet it certainly has more 

 characters of the latter than of the former genus. It is, in shape, very much 

 like the larger specimens of C. hivittatus. The back of the pronotum is 

 not sloped from the median carina, but is exactly like the dorsum oi femur- 

 rubrum, spretus, bivittahis, etc. 



Opomola brachyptera, Scudd. 



As Mr. Scudcler's description is founded on a single male speci- 

 men, I will give a full description of what I conceive to be a 

 female of the same species. 



Female. Vertex carinated ; elytra narrow, reaching the tip of 

 the second abdominal segment. Antennge broad, ensiform. Pale 

 orange-brown, with minute dusky points. 



Occiput convex, straight, not ascending, with a shallow longi- 

 tudinal depression each side, leaving a low, broad, rounded ridge 

 in the middle. Yertex triangular, margins turned up, a veiy dis- 

 tinct median carina, the three meeting together in front form a 

 blunt point; length in advance of the eyes equal to about one- 

 third the entire length of the head. The face tricarinate, or rather 

 quadricarinate, as the frontal ridge is so deeply sulcate that it 

 forms two distinct carinas, which meet at the vertex; all some- 

 what divergent, and reaching the cross suture. Eyes oblong-ovate. 

 Antennse scarcely as long as the head and thorax, ensiform, flat- 

 tened, and slightly prismatic. Pronotum about as long as the 

 head, tricarinate; sides almost perpendicular, parallel; only the 

 posterior transverse impression distinct on the dorsum, situated a 

 little behind the middle. Elytra lanceolate, narrow, reaching the 

 extremity of the second abdominal segment. Wings narrow, 

 minute, about half as long as the elytra. Abdomen long, slender 

 and somewhat cylindrical, slightly carinated on the dorsum. The 

 four anterior legs short and slender; posterior femora slender, 

 straight, and not as long as the abdomen ; tibiae slender, nearly 

 cylindrical, somewhat hairy at the apex. The prosternal point is 

 short, being only a blunt protuberance ; behind it the prosternum 

 is marked by a shallow sulcus (but this may not be constant). 

 Color (dried after long immersion in alcohol). General color a 

 pale orange-brown, without distinct spots or markings, but with 

 minute dusky points. The antennae brown, with a purplish tinge ; 

 vertex, legs, and abdomen tinged with the same color. Spines of 



1871.] 



