AMERICAN COLEOPTERA. 101 



deeply striate, strite punctured, intervals moderately convex, the third, 

 fifth and seventh interrupted by three punctures on each, the third at 

 times with four punctures. The body beneath is black. Length 

 .48 — .54 inch ; 12 — 14.5 mm. 



N. Gebleri, Dej. Spec. V, 573 ; Esch. Zool. Atlas, V, p. 23, pi. 25, fig. 3. 



This species is not unlike the preceding in its general form, but 

 more elongate. Color metallic-green changing to cupreous and violet. 

 The thorax is less broad than in mefalltca, sides less rounded, margin 

 moderate, distinctly reflexed, hind angles rectangular, but less dis- 

 tinctly than in the species mentioned. The elytra are sub-parallel, 

 feebly striate, stria3 very faintly punctured. Interstices flat, the third 

 with five or four punctures, the seventh with three. Length .40 inch; 

 10 mm. 



Occurs only in Russian America. 



N. viridis, n. sp.— Brilliant metallic-green. Head smooth, impunctured, 

 with vague frontal impressions. Thorax similar in shape to Salhbergi, one- 

 half broader than long, sides strongly rounded in front, deeply sinuate behind, 

 hind angles rectangular, margin slightly reflexed; surface smooth with coarse 

 punctures along the margin, and in the basal transverse impression; apical 

 and median impressions moderate, basal impression deep. Elytra parallel, 

 humeri moderately prominent, surface moderately convex, distinctly striate, 

 striae finely but distantly punctured, intervals feebly convex and with five 

 impressions on the second, the first two very distant, those toward the apex 

 close. Body beneath black, antennae, palpi, and legs rufous. Length .30 inch; 

 7.5 mm. 



This species may be readily known by its color, being the only spe- 

 cies of an uniformly metallic-green in our series. 



Two specimens received by Mr. Ulke from St. Michaels, 

 Alaska. 

 N. obliqua, Lee. Proc. Acad, 1S66, p. 363. 



This species resembles N. Mannerheimn, Esch., but has the sides 

 of the elytra more nearly parallel. The third stria has a single 

 puncture at about one-third from the apex, and a very faint trace of 

 another still nearer the apex. The striae are rather deep, scarcely 

 punctured, the intervals flat. The color is black, without any trace 

 of metallic lustre, the legs are piceous and the tarsi, antennae and 

 palpi paler. Length .44 inch; 11 mm. 



I have seen two specimens from Colorado. 



N. suturalis, Lee. Agass. Lake Super, p. 209. — Black, sometimes shining, de- 

 pressed. Sides of thorax oblique, as in the preceding species. Elytra with 

 sub-parallel, feebly rounded, sides; surface moderately deeply striate, strife 

 distinctly but irregularly punctured, intervals flat; third striae with four dis- 

 tinct large punctures. Length .40 — .41 inch; ^10—11.5 mm. 



TRANS. AMER. EST. SOC. (14) SEPTEMBER, 1S70. 



