NORTH AMERICAN COLEOPTERA. 



WA 



Synoptic Table of Species. 



Pronotuin contracted at tlie base. 



Antennae robust tropioiiiii. 



An ten lire slender plan mil. 



Pronotum not contracted at the base. 

 Body short and broad. 



Size moderate, color pitchy black Collnili. 



Size exceedingly minute, color pale Iloriiiaiiiiiii. 



Body elongate. 



Color ferruginous, or testaceous. 



Antennre very long and slender Coliiiiibiaiiiiin. 



Color black, or piceous. 



Pronotum widest at the base obseiiriiiii. 



Pronotum widest near the middle Kliarni. 



P. Collaiii (Miiklin) Mannerheim Bull. Mosc. 2i\, p. 95, 1S53.— L. c. .6.'', mm. 

 — Oblong, moderately convex, pitchy black, sparingly clothed with griseous hair: 

 head large and broad: eyes large, prominent; thorax transverse, quadrate, scareelv 

 longer or broader than the head, widest near the middle, closely tuberculate ; sides 

 rounded, posterior angles obtuse ; elytra scarcely wider, but half as long a^ain as 

 the head and thorax, widest near the middle, closely and dee[)ly asperate ; sides 

 slightly rounded, apex broad and rounded; legs and antennre rather long, vellow; 

 the latter rather dusky. 



Diifers from other species in its oblong form, broad head and tliora.x, 

 and pitchy black color. 



T^nited St:ites. 



P. Ilornianiiiu n. sp.— L. c. .:!7 mm.— Oblongum, convexum, sat nitidum, 

 castaneum pilis griseis vestitum ; capite magno lato, oculis modicis; pronoto parvo 

 transverso, capite breviori vix latiori, nitido tuberculis exiguis confertim obtecto, 

 lateribus leviter rotundatis, leviter marginatis, margine basali leviter reflexa an- 

 gulis fere reetis; elytris oblongis, capite atque pronoto parum longioribus vix lati- 

 oribus, ad media latissimis, profunde et reticulatim asperatis. lateribus minime 

 rotundatis, apice lato rotundato; pedibus late, antennis, obscure, flavis. 

 Head large and broad, produced in front, shining, closely covered with minute 



tubercles; eyes moderate, rather prominent ; antennje long, dark yellow. 

 Thorax small, transverse, shorter and scarcely wider than the head, rather shin- 

 ing, closely covered with minute tubercles, widest near the middle ; sides slightlv 

 . rounded and faintly margined, basal margin straight and faintly reriexed, with 



the angles nearly right angles. 

 ScuTELi.uM small, triangular, closely asperate. 

 Elytra oblong, convex, rather longer, but scarcely wider than the head and thorax, 



widest at the middle, deeply and reticulately asperate ; sides very little rounded, 



ape.x very broad and much rounded. 

 Aboomkn with the pygidium pale. 

 Legs moderate, bright yellow. 

 Under i"ARTs pale castancous, with the mouth, hinder p;irt of the metasternum, 



an<l teniiiual segments of the venter (lavesceiil. 



