DESCRIPTIONS OF NEW SPECIES. 



postice valde angustato, lateribus late marginatis antice valde rotunda- 

 tis postice sinuatis, angulis posticis rectis prominulis, elytris versus 

 basin pallidioribus, striis punctatis, interstitiis sat dense punctatis, an- 

 tennis pedibusque obscure ferrugineis. Long. -38. 



Methy Lake, and Labrador ; Mr. Kennicott, and Prof. Chad- 

 bourne. A very distinct species ; the lateral margin of the tho- 

 rax is not so wide as in G. reflexa, but about the same as in G. 

 cribricollis. 



20. C. "borealis. Nigro-picea, parce pubescens, capite thoraceque pro- 

 funde haud grosse punctatis, hoc latitudine vix breviore, postice fortiter 

 angustato, lateribus modice marginatis undulatis postice subsinuatis, 

 angulis posticis obtusis subrotundatis, elytris cyaneo-tinctis, humeris 

 rufesceutibus, striis fortiter punctatis, interstitiis parce subtiliter sub- 

 seriatim punctatis, antennis pedibusque ferrugineis. Long. '31-'35. 



North Red River, Mr. Kennicott : Nova Scotia, Mr. Ulke. Of 

 the same shape as G. pilosa, with the sides of the thorax irregu- 

 larly rounded in the same manner, but with the hind angles more 

 obtuse, and slightly rounded at tip ; the pubescence of the elytra 

 is shorter, and the punctures of the intervals are smaller and almost 

 arranged in single lines. 



RHOMBODERA REICHE. 



21. R. "bicolor. Capite thoraceque rufo-testaceis, hoc latitudine plus 

 sesqui breviore, postice yalde angustato, et profunde impresso lateribus 

 subangulatis marginatis, linea dorsali tenui, elytris nigris fere obsolete 

 striatis, margine tenui laterali rufo-testaceo, abdomine antennisque pi- 

 ceis, pedibus rufo-testaceis. Long -20. 



Western- States: Dr. Schaum. Resembles R. pallipes Lee., 

 except in color. 



PL,ATYtfUS BON. (emend. BRDLL^.) 



22. P. caudatus. Nigro-piceus, thorace latitudine longiore, ovato, 

 lateribus valde marginatis, basi late rotundato, angulis posticis obtusis, 

 linea dorsali profunda, iinpressionibus basalibus elongatis angustis, 

 elytris ovalibus planiusculis fortiter marginatis obsolete striatis, in- 

 terstitiis Imo, 3io, 5to et 7mo punctis parcis uniseriatim positis, apice 

 oblique sinuatis et singulatim acuminatis ; pedibus, palpis, antennis- 

 que ferrugineis, his articulo 3io sequentibus duobus vix breviore. Long. 

 50. 



Western States, one male ; Mr. John Akhurst. Resembles P. 

 larvalis Lee., but the thorax is less broadly margined, the elytra 



