268 MEMOIRS ON THE COLEOPTERA 



agrestis but very much shallower, the lateral asperities rather larger but 

 less numerous; elytra nearly as in agrestis but more finely and uniformly, 

 extremely densely punctate and with the raised threads much feebler 

 though stronger than in the preceding. Length (c?) 19.5 mm.; width 

 5.4 mm. Indiana, Levette. 



This species differs from agrestis in its more slender outline, 

 smaller, less deeply trifossate and laterally much less angulate pro- 

 thorax, with the punctures less minute, more minute and uniform 

 elytral sculpture, with the threads feebler and in the relatively 

 shorter second antennal joint, this being only one-half as long as 

 the third. Agrestis is notably more arctic in distribution, my 

 series being from Lake Superior, Maine, Labrador and Ungava. 



Tetropium Kirby. 



This genus is well distinguished from any of those preceding by 

 its divided eyes, the fine elevated isthmus connecting the upper and 

 lower portions having no facets. The following has been recently 

 received : 



Tetropium columbianum n. sp. Rather slender, dull in lustre, every- 

 where very densely punctate, the elytra extremely finely, the pronotum 

 less so and the head rather strongly; color black, the elytra fulvous-brown, 

 the entire under surface deep black; femora black, the tibiae piceous, the 

 tarsi slightly paler; head small, the median line finely, deeply sulciform; 

 eyes very widely separated, small and finely faceted; prothorax nearly as 

 long as wide, parallel, the apex and base transversely truncate and equal; 

 sides evenly and strongly rounded ; surface very convex, extremely densely 

 punctate throughout, not impressed, except a triangular subtransverse 

 pit before the base; scutellum black, densely and minutely punctate, 

 very obtuse; elytra more than a fourth wider than the prothorax, parallel, 

 with straight sides, individually abruptly and very obtusely rounded at 

 tip, opaque, the two discal raised lines barely traceable; under surface 

 shining, finely, not densely punctate and with rather long coarse ashy 

 hairs; hind tarsi very slender, three-fourths as long as the tibia, nearly as 

 in Criocephalus, the third joint cleft almost to the base. Length (cf ) n.8 

 mm.; width 3.0 mm. British Columbia (Inverness), communicated 

 by Mr. J. H. Keen. 



Differs from parallelum, to which alone it is allied, in its smaller 

 head, broadly rounded and not angulate sides of the prothorax, 

 more evenly punctate, less pubescent and medially unimpressed 

 pronotum, much more broadly obtuse scutellum and other char- 

 acters. The antennae are missing in the type. 



