long's second expedition. 199 



portion of the latter at base ; basal disk dusky ; a glabrous line 

 extending to the tip and margined with dusky; a large cinereous 

 semiorbicular spot in which are abbreviated black lines, extend- 

 ing from the humeral angle to the lateral middle; beneath 

 covered with black punctures; feet black; knees and spot near 

 the tip fulvous; tibia fulvous with black Hues; tarsi black. 



Length more than one-fourth of an inch. 



This species may be distinguished by the curvature of [299] 

 the line of the head, and by the large spot on the humeral re- 

 gion. 



1. S. ^eneifrons. — Dull fulvous, varied with fuscous; head 

 and two spots on the thorax brassy. 



Inhabits North-west Territory. 



Body oval, punctured; head densely punctured, convex, with 

 two impressed nearly rectilinear lines from the tip abbreviated at 

 the vertex ; lateral edges convexly arcuated, tip rounded, the 

 space included between the impressed lines very slightly project- 

 ing ; antennas fuscous, basal joint whitish ; thorax dull fulvous, 

 with obsolete longitudinal fuscous spaces, and a brassy triangular 

 spot each side before ; lateral edge nearly rectilinear to the pos- 

 terior angles, which are rounded entire; scutel dull fulvous, 

 varied with fuscous ; hemelytra punctured, visible portion tri- 

 angular ; beneath pale, head brassy, a brassy spot on each side of 

 the pectus ; thighs with a few black points. 



Length about three-tenths of an inch. 



This species is subject to vary in being rather smaller, and in 

 the fuscous variegations being hardly discernible, but the other 

 characters remain unchanged. 



MEMBRACIS Fabr. Latr. 



1. 31. diceros. — Thorax 2-horned; varied with brown, pale 

 before; wings and beneath blackish. 



Inhabits United States. 



Body above punctured, truncated and vertical before, sur- 

 mounted by two horizontal subeonic horns extending laterally ; 

 clypeus, vertical portions of the thorax, and triangular space in- 

 cluded between the horns, whitish-green, varied witli fuscous ; 

 horns fuscous behind and beneath; back acutely carinated, termi- 

 nated in a very acute subulate [300] declined point nearly as long 



