286 CURCULIONIDES. 



3. C. triangularis. — Thorax with two obtuse tubercles . 

 elytra with a common subtriangular, whitish spot at base. 



Inhabits Indiana. 



Body robust, short : densely punctured : antennas bright rufous, 

 club blackish : rostrum with somewhat elevated lines ; thorax 

 with dense, rather large punctures ; a longitudinal indented line 

 in which are white hairs ; an obtuse tubercle each side a little 

 behind the middle : elytra with deeply impressed striae, and 

 rather large punctures ; interstitial lines transversely rugose ; at 

 base is a common elongated whitish triangular spot; lateral edge. 

 behind the humerus, white ; beneath with scale-like, white hairs : 

 thighs unarmed. 



Length about three-twentieths of an inch. 



This is longer than pericarpius F. which it much resembles. 

 but the common spot is much more dilated behind and 

 gular. 



4. C. in^equalis. — Thorax 4-tuberculate, and bidentate before. 

 Inhabits Indiana. 



Body brown, short and robust : thorax with an indented line. 

 which so indents the anterior edge as to exhibit two dentieuk- 

 tions in that part ; each side of the middle is an obtuse rather 

 large tubercle, and still more lateral and a little posterior is a 3es>* 

 obtuse tubercle : elytra with the alternate interstitial lines mor< 

 elevated. 



Length over one-tenth of an inch. 



I obtained many specimens resting upon a newly constructed 

 fence in the spring. 



MONONYCHUS Schupp. 

 M. vulpeculus Fabr. Schonh. 



On the flowers of the Ceanothus americanus L. and Verbascurn 

 thapsus L. in July. 



ZYGOPS Schonh. 



1. Z. quercus. — Body black, covered with white scales ; 

 rostrum a little curved [21] towards the base; front between 

 the eyes very narrow : elytra striated, at tip a little reflected : 

 thighs not obviously emarginated, nor toothed. 



Length over one-tenth of an inch. 



