20 LE CONTE.— LONGICOEN COLEOPTERA 



This genus seems closely related to Compsocerus and Rhopalocerus, but differs from 

 both by its glabrous antennse. 



1. T. LONGiPES. — Nigra brevissime cinereo-pubescens, thorace latitudine plus sesqui longiore, loevi toto 

 rubro, postice vix biimpresso, elytris grosse punctatis apice vix armata. Long. '3. 

 Stenocorus longipes, Say. J. A. N. S., 3. 



Pennsylvania, Missouri Territory : rare. 



SCLEROCERUS, DeJ. 



Caput breve obtusum. 



Antennte elongata; pilosa 11-artIculatae. 



Thorax depressiusculus, postice subito valde coristrictus. 



Palpi maxillares longiores filiformes. 



Acetabula antica extus angulata. 



Elytra baud abbreviata, apice rotundatim acuminata. 



Body elongate, linear, depressed, pubescent. Connects the present group with 

 Callidium, from which it differs by having the palpi not dilated. 



1. S. LINEARIS. — Fusco-testaceiis, elytris pallidioribus, capita canaliculato, thoraceque scabroso-punctatis, 

 hoc disco subimpresso, elytris capite thoraceque triple longioribus rugose punctatis, linea utrinque 

 obsoleta elevata. Long. '65. 



Stenocorus 1 linearis, Harris Hfd. Tr. 85. 



Sclerocerus muticus, Dej. Cat. 



New York, Mr. Guex ; rare. 



STENOPTERUS. 



Caput elongatum porrectum. 



Antennae pubescentes filiformes, 1 l-articulatas. 



Palpi subaequales, articulo ultimo ovali. 



Thorax medio obtuse tuberculatus, dorso valde inaequalis. 



Acetabula antica extus angulata. 



Elytra abbreviata, subulata. 



1. S. SANGuiNicoLLis. — Niger, thorace Iscte rubro, margine antico posticoque nigris, transversim biconstricto, 

 dorso 3-tuberculato, elytris testaceis, parce punctatis, pedibus posticis flavis, clava iemorali tibiisque 

 apice nigris. Long. -S. 

 Say. Bost. J. N. H., 1, 194. 

 JVecydalis sanguinicollis, 01. 



The male has the posterior tibise very much bent, and roughened with short acute 

 spines. Lake Huron, Ohio, and Alabama : rare. Dr. Schaum. 



