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ACADEMY OF NATURAL SCIENCES 



upon the vertex/the exterior ones abbreviated, the others double 

 and including the superior stemmata, whence they proceed single 

 to the occiput : thorax with several black lines, the middle one 

 double and angulated on the exterior side : scutel with eight or 

 ten black lines and curves : hemelytra hyaline, with three or 

 four brown anastomoses, and near the tip of each nervure a brown 

 dot ; costal nervure and nervures towards the base green, edged 

 with a very slender black line : posterior tibiae with the four 

 spines in pairs, perfectly opposite ; the fifth spine very near the 

 terminal spines ; beneath immaculate. 



Length to tip of hemelytra one inch and one-fourth. 



This species is rather rare. [236] 



2. C. RIMOSA. — Black ; posterior edge of the thorax rufous. 

 Inhabits Missouri and Arkansaw. 



Body black above : head a little angulated before : hypostoma 

 with the double middle line or lateral margin rufous ; a rufous 

 spot over the antennae ; thorax obsoletely varied each side with 

 piceous ; posterior and lateral edges rufous : scutel with the ele- 

 vated cruciform line, two spots before it, and two or three on each 

 side rufous : hemelytra without any margined anastomosis ; the 

 cellules much undulated : tergum, posterior edges of the segments 

 rufous : beneath rufous, varied with black : posterior tibiae with 

 four equidistant spines in one longitudinal series, and two remote 

 ones in another. 



Length to the tip of the hemelytra one inch and one-fourth. 



Mr. Nuttall presented me two specimens, which he obtained 

 on the Missouri, and I found one on the Arkansaw. 



On the prominent middle of the hypostoma in a very obvious 

 impressed line. 



This species is nearly as large as the C. septendecim Linn., 

 from which however the above description will distinguish it, 



3. C VITRIPENNIS. — Hemelytra vitreous immaculate ; ante- 

 rior thighs, posterior spine hardly oblique. 



Inhabits Arkansaw. 



Body blackish above : head with a rufous anterior line between 

 the eyes and posterior margin : hypostoma [237] convex, no 

 longitudinal impressed line ; greenish with a blackish disk : tho- 

 rax with a large lateral rufous confluent spot, central line and 



[Vol. VI. 



