APPENDIX. 289 



R. riibricollis, Melsh. Catal. 



JBodi/ slender ; head hairy, black, with irregular punc- 

 tures larger on the rostrum ; antennse and lahrum dark 

 piceous ; thorax rufous, hairy, with dilated irregular punc- 

 tures, and a longitudinal impressed dilated line, which 

 neither reaches the anterior nor posterior margins ; scutel 

 black, rounded ; elytra with regular striae of punctures fur- 

 nishing upright hairs ; interstitial lines with each a series 

 of upright hairs ; pectus rufous ; postpectus and venter 

 blackish ; feet rufous, pale. 



Length more than three-twentieths of an inch. 



This insect occurs occasionally in Pennsylvania ; we also 

 found a specimen on Red river of Lake Winnepeek. 



CERAMBYX. 



C. scutellatus. Brassy-black, punctured ; scutel purr 

 white. 



Inhabits North-west Territory. 



Body brassy-black ; punctures numerous, confluent, im- 

 pressed, with minute hairs ; head with a deeply impressed 

 line between the antennse, extending to the origin of the 

 thorax ; front with minute punctures ; labruvi piceous ; 

 Tnandibles dark piceous at base ; antennae longer than the 

 body, dark reddish-piceous, paler at base ; thorax with a 

 very robust short spine on each side j posterior margin 

 with an impressed transverse line ; anterior margin with 

 the punctures so transversely elongated and confluent as 

 to appear wrinkled ; feet blackish-piceous, paler at base j 

 scutel covered with dense prostrate pure white hair ; ely- 

 tra with the impressed punctures larger at base, trans- 

 versely confluent ; humerus rather prominent, obtuse ; on 

 different parts of the elytra is dense, dirty brown, ver\^ 



