THE CANADIAN ENTOMOLOGIST. 59 
[165] 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 impression on each side, lateral contour very convex, con- 
stricted 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. Tibiz 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. [In- 
cluded in the List of Canadian Coleoptera. Taken on the North Shore 
of Lake Superior by Agassiz’s Expedition. | 
219. PYTHO AMERICANUS A7rby.—Length of body 5—7 lines. Se- 
veral taken in Lat. 54°, and in the journey from New York to Cumber- 
land-house. 
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 con- 
stricted behind ; and the elytra 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 abdomen, 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. [Taken in various parts of Canada. | 
[166.] FAMILY TROGOSITIDÆ. 
220. TROGOSITA AMERICANA Azrby.—Length of body 5 lines. Two 
specimens taken in the journey between New York and Cumberland- 
house. | 
