go liESCKIPTION OP INSECTS 



Genus Tuechus. Clairville. 

 Anterior tibia emarginate ; anterior and intermediate tarsi of 

 the male dilated ; elytra and wings entire ; palpi filiform, 

 the last joint of the exterior ones as long or longer than 

 the preceding joint, not narrowed at base, but forming 

 with that joint a fusciform mass. 



Species. 



1. T. *conjunctus. Head piceous-black ; thorax rufous, im- 

 punctured ; elytra dusky ; feet testaceous. 



Length three-twentieths of an inch. 



Body impunctured, glabrous. 



Head black or deep piceous; antennae brown ; base and palpi 

 testaceous ; labrum piceous ; mandibles rufous at base. 



Thorax rufous, rounded behind, dorsal line not deeply im- 

 pressed, basal lines slightly excavated, base impunctured. 



Elytra blackish, margin and suture piceous obscure, strise 

 impunctured, interstitial lines depressed. 



Pectus rufous ; sternum black ; feet testaceous ; postpectus 

 black ; abdomen black. 

 Very common. The disk of the thorax is sometimes 



dusky or blackish. 



3. T. *partiai'ius. Head black ; thorax rufous, rounded be- 

 hind, punctured at base ; elytra pale, disk dusky ; feet tes- 

 taceous. 



Length less than three-twentieths of an inch. 



Body glabrous, beneath black. 



Head black ; antennae brown ; base and palpi testaceous ; 

 nasiis and labrum piceous. 



Thorax rufous, rounded behind, dorsal line distinct, con- 

 tinued to the base, posterior lines excavated, dilated, and 

 punctured, a few obsolete punctures before. 



Elytra pale rufous or testaceous, somewhat darker on the 

 disk, strise impunctured. 



Pectus rufous ; sternum black ; feet testaceous ; postpectiis 

 and abdomen black. 



