46 



the frontal impression is deeper and ol long ; the discoidal spot of the 

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

 margm. 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 acaminate 

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

 colour resembles that of O. Ameruanum, but is less brilliant. [Also a 

 variety of S pe/tata.^ 



FAMILY TROGOSITID.«. 



149. PjiLTis FERRi GiNEA 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 De Geer 

 has observed, the common bed-bug. Head thickly punctured ; prothorax 

 deeply eaiarginate for the reception of the head, thickly punctured; lateral 

 margin sloping, reflexed : disk 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 reflexed ; epipleura linear at 

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



FAMILY NITIDl^LIDiE. 



150. NiTiDULA ORSCURA Fabr. — Length of body 2j^-2^ lines. 

 Several specimens taken in Lat. 65'. 



Body subdepressed, black, with its lustre obscured by inconspicuous 

 decumbent subcinereous hairs. Head minutely punctured, transversely 

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

 antennae piceous : prothorax minutely punctured, most visibly at the 

 sides, which are depressed ; lateral margin reflexed ; elytra very obtuse 

 at the apex, they have the appearance of being acuducted which seems 

 to be produced by the pubescence : legs piceous or rufo-picecus. 



[106.] 151. NiTiDULA OssiuM Kirby. — Length of body i^^-i^ 

 lines. Several specimens taken in Lat. 65°. 



Mr. Stephens regards this as a variety only of the preceding species, 

 but it is smaller, narrower in proportion, the legs and stalk of the antennae 

 are paler, and the elytra and sides of the prothorax, in the British as well 

 as American specimens, are piceous. In other respects they agree. 



