102 GEORGE H. HORN, M. D. 



Occurs ill the Lake Superior region, and in uortliorn Xew Hamp- 

 shire. 



N. hudsonica, Lee. New Species, p. 3. 



Closely related to Sahlhergi, hut diflfers in its more depressed form 

 aud by hind angles of the thorax being scarcely rectangular. The 

 sides of the thorax are less rounded in front and feebly sinuate be- 

 hind, and it thus approaches ohliqiia in form The sides of the ely- 

 tra are nearly parallel, the surface faintly striate, the striae scarcely 

 punctured, and the third with four larger punctui'es rather vaguely 

 defined. Length .40 — .42 inch ; 10 — 10.5 mm. 



Two specimens from Saskatchewan, Hudson's Bay Territory. , 



N. Sahlbergi, Fisch. Ent. Euss. iii, p. 254, pi. 14, fig. 2 ; E.«ch. Zool. Atlas, 

 1833, p. 23; castanipes, Kby. N. Z. iv, p. 20, vivesta (var.) Lee. Agass. Lake Super- 

 p. 209. 



This species is somewhat viiriable in the form of the thorax. From 

 typical specimens in Dr. Leconte's cabinet, and a long series of speci- 

 mens, the following specific characters have been drawn. 



Head smooth, impunetured, frontal impression shallow. Thorax one-half 

 broader than long, sides strongly rounded in front, sinuate behind, hind angles 

 always rectangular, sometimes slightly prominent outwards; lateral margin 

 moderately reflexed, and with few coarse punctures within, basal transverse 

 impression moderately deep and sparsely coarsely punctured; median and 

 apical impressions moderate. Elytra sub-parallel, faintly striate, striae dis- 

 tinctly punctured, third stria with four, sometimes five moderately distinct 

 large punctures, intervals flat. Body totally black, legs piceous or castaneous, 

 with the tibiae at times paler. Length .40 inch; 10 mm. 



The form called by Dr. Leconte, moesta, is slightly more depressed, 

 in other respects not diifering from the true type. In the 3ISS. of 

 the late Dr. Zimmerman the opinion is expressed that the Ilelohia 

 (^Nehria') casfanipes, Kirby, is identical with this species. The des- 

 cription of Kirby applies much more nearly to this than any other of 

 our species, and is moreover the most abundant species in the region 

 from which the collections sent to Kirby were derived. The descrip- 

 tion of Kirby certainly does not apply to the species to which it is 

 attached in the cabinet of Dr. Leconte, which is moreover found as 

 far as known only in upper California and Oregon. 



This species has a wide distribution, being found along the Pacific 

 region from Sitkha to Oregon and eastward to New Hampshire. 



N. bifaria, Mann. Bull. Mosc. 1853, iii, p. 128.— Black, shining. Thorax 

 rather small, disc transversely wrinkled, especially toward the sides, sides 

 strongly rounded in front, sinuate behind, hind angles sub-rectangular. Ely- 

 tra sub-parallel, rather deejily striate, striae punctured, intervals convex, the 

 third with four, the fifth with ^three large punctures. Body beneath black, 

 femora rufous, tibiae black. Length .40 inch; 10 mm. 



