I 72 THE CANADIAN ENTOMOLOGIST 



INSECTS OF THE NORTHERN PARTS OF BRITISH AMERICA. 



COMPILED BY THE EDITOR. 



From Kirbys Fauna Boreali-Americatia : Tnsecta. 



(Continued from page 15G.) 



[104]. 148. Oiceoptoma [Silpha] Canadense Kirby. — Length of 

 body 7 lines. Taken in dead fish on the shores of Lake Huron in 

 Canada, by Dr. Bigsby. 



This species approaches near to O. Amerkanum, but it is smaller, 

 the frontal impression is deeper and oblong : the discoidal spot of the 

 prothorax is much larger, extending from the anterior to the posterior 

 margin, it is scarcely at all lobed, and only the punctures of its posterior 

 part exhibit the appearance of angular scratches : the elytra are dirty- 

 yellow at the apex, and the yellow occupies a much greater portion of 

 the extremity than in the two preceding species, they are not acuminate 

 at the tip, but have a very slight tendency to a sinus ; the epipleura in 

 colour resembles that of O. Americanum^ but is less brilliant. [Also a 

 variety of S. pel lata ?\ 



FAMILY TROGOS1TID.-E 



149. Peltis ferruginea Linn*- Length of body 5 lines. A single 

 specimen taken in the journey from New York to Cumberland-house. 

 The insects of this genus are usually to be met with under the bark of 

 trees, and in fungi. 



[105.] Body oblong, flat, ferruginous, resembling greatly, as I)e Geer 

 has observed, the common bed-bug. Head thickly punctured : prothorav 

 deeply emarginate for the reception of the head, thickly punctured : lateral 

 margin sloping, refiexed : disl^ of the elytra with six elevated ridges 

 gradually diminishing in length from the suture outwards : between the 

 ridges is a double row of punctures, each pair of punctures being con- 

 nected by a transverse furrow ; outside the discoidal ridges are several 

 irregular rows of punctures ; lateral margin refiexed : epipleura linear at 

 the apex, gradually dilated at the base. [Taken in Canada.] 



FAMILY MTlDr L1D.E. 



150. Nitidula OBSCURA Fabr. — Length of body 2 ^ 2 1 .; lines. 

 Several specimens taken in Lat. 65 s . 



Body subdepressed. black, with its lustre obscured by inconspicuous 

 decumbent subcinereous hairs. Head minutely punctured, transversely 

 impressed between the eves ; occiput elevated ; mouth and stalk of the 



