North American Rliynchophora. 281 



Prothorax with a rather wide and very distinct median 

 vitta. 

 Pronotal scales smaller, those of the median vitta nar- 

 row and elongate ; elytra with the alternate intervals 

 vittate $ , or confusedly tessellate ? ; male very slender, 



female robust varians 



Pronotal scales longer, those of the vitta broader ; elytra 

 not vittate, but confusedly maculate, .marg^aritosus 

 Prothorax without distinct median vitta. 



Scales of head and prothorax cupreous ; base and apex of 

 the latter equal in width ; color dark ; punctures very 



distinct procerus 



Scales cinereous throughout ; size larger ; prothorax nar- 

 rower at the apex than at the base occidentalis 



Elytral striae not distinctly punctate (where normally squa- 

 mose). 

 Alternate intervals of elytra not, or very feebly, elevated; 

 form robust. 

 Dark setae of elytra strigose, robust, and in the form of 

 elongate, obtuse scales ; white setae broad, short, 

 squamiform, and but slightly different in form from 

 the much more numerous darker ones. 

 Color gray; elytra externally with a broad, white vitta; 



beak fiat eximius 



Color brown ; elytra not vittate ; beak broadly im- 

 pressed moiitanus 



Dark setae of elytra not strigose, in form cylindrical and 

 pointed. 

 Dark setae very short, subrecumbent and robust, 



nebulosus 

 Alternate intervals distinctly more elevated ; form slender, 



alteriians 

 Elytra uniform in tint, or very nearly so. 

 Dark brown, beneath pale reddish -brown ; eyes small, scarcely 



longer than wide sordidiis 



Gray, whitish beneath ; eyes normal, distinctly longer than 

 wide ; prothorax short, very strongly and angularly arcuate 



at the sides osculans 



Inner margin of the eye prominent, and distinctly elevated above the 

 fiat surface of the front. 

 Beak and front sulcate. 

 Antennal scape much shorter than the funicle, and but slightly 

 longer than the club. 

 Pronotal punctuation coarse and very deep ; scales very sparse, 



scarcely obscuring the punctures prominens 



Pronotal punctuation finer ; scales denser, almost completely 

 concealing the punctures. 



