cucujid^e. 165 



DESCRIPTION. 



Body linear, depressed, black, shining, punctured. Head with a longitudinal impression on each 

 side between the eyes ; nose smooth, flat, with the intermediate space less punctured ; antennae 

 and palpi dusky-rufous : prothorax conspicuously channelled, with the usual deep longitudinal impres- 

 sion on each side, lateral contour very convex, constricted posteriorly : elytra furrowed with elevated 

 smooth interstices ; furrows punctured and abbreviated at each end ; base of the elytra, where the 

 furrows cease, punctured : body underneath minutely punctured ; abdomen piceous ; tarsi rufous. 



Variety B. Tibia? also rufous : thighs piceous. 



C. Body entirely ferruginous. It agrees with A in sculpture and every other respect 

 except colour. 



Many individuals of the present species were taken in the Expedition, all of them agreeing in 

 having no tint of blue in the elytra ; in having the levigated part of the base punctured, and the 

 sides of the prothorax more prominent, than in P. depressus, from which it seems clearly distinct. 



(219) 2. * Pytho Americanus. American Pytho. 



P. ( Americanus) rufus ; capite prothoraceque nigris, hoc antice latiori, obsoletius canaliculato, utrinque lorgitudinaliler foveatu : 

 elytris atro-cceruleis, striatis, basi vix punctulatis. 



American Pytho, rufous : head and prothorax black ; the latter widest anteriorly, less conspicuously channelled, longitudi- 

 nally impressed on both sides : elytra deep blue, furrowed, scarcely punctured at the base. 



Length of the body 5 — 7 lines. 



Several taken in Lat. 54°. and in the Journey from New York to Cumberland- 

 house. 



DESCRIPTION. 



This species differs from the preceding chiefly in having the abdomen, medipectus, postpectus, 

 legs and mouth rufous ; in a slight punctured elevation on each side of the nose ; the space between 

 the eyes also is more distinctly punctured, and there are two deep impressions under the head 

 between the eyes; the prothorax is widest anteriorly, and not constricted behind; and the elvtra are 

 deep blue, and scarcely punctured at the base. 



It differs from P. depressus, in being wider in proportion to its length, and in having the abdo- 

 men, and two posterior sections of the breast, invariably rufous. 



Variety B. Elytra rufous at the sides and tip. 



C. Elytra entirely rufous. 



D. Elytra entirely rufous ; head and prothorax piceous. 



E. Body entirely rufous. 



