256 ACADEMY OF NATURAL SCIENCES 



the antenna; : front brown, deeply impressed with the grooves of 

 the rostrum, presenting three prominent caringe : rostrum with a 

 fuscous band on the middle, and spot near the tip : thorax yel- 

 lowish : hemelytra white, an obsolete band, at base ; an oblique 

 distinct one on the middle united to a curved one beyond the 

 middle, which attains the tip and incloses a linear oblique spot 

 near the tip of the costal margin : feet spotted with fuscous : ab- 

 domen pale yellowish : tergum blackish in the middle. 



Length of the body and wings three-twentieths of an inch. 



Came on board of our bo^t as we ascended the Missouri, in 

 considerable numbers on the third of July. The hemelytral 

 fascia, may, on many specimens, be traced into the form of the 

 letter W, [338] the oblique spot being included between the 

 posterior curve of the letter and the costal margin. 



CERCOPIS Fabr. 



1. C. QUADRANGULARis. — Brownish-cinereous ; elytra with 

 two oblique brown bands confluent at the outer margin : beneath 

 black ; feet annulate with pale. 



Inhabits Missouri. 



Body brownish-cinereous, covered with dense, minute hairs : 

 head obsoletely spotted : eyes fuscous, a pale longitudinal line on 

 the middle, in which is a brown central line : stemmata indis- 

 tinct, black : thorax emarginate at the anterior angles for the re- 

 ception of the eyes, and deeply emarginate behind for the recep- 

 tion of the scutel ; a double series of obsolete, indented spots 

 before : scutel, tip and basal angles acute : hemelytra pale brown - 

 ish-cinereons ; an oblique black-brown fascia from the inner basal 

 angle, is confluent at the middle of the exterior margin, with an 

 oblique fascia which terminates near the sutural tip j tip with a 

 small blackish curve ; region of the humerus dusky ; beneath 

 black : feet black : thighs annulate with pale ; posterior pair of 

 tibiic pale, armed with two robust spines behind, and numerous 

 small ones at tip ; posterior tarsi armed with spiuules at the tips 

 of the first and second joints beneath : abdomen black j tail pale 

 beneath. [339] 



Length more than three-tenths of an inch, 



2. C. OBTUSA. — Head and anterior part of the thorax pale, 



[Vol. IV. 



