100 GEORGE H. HORN, M. D. 



The color beneath testaceous, sides of abdomen brownish. Length .40 

 — .44 inch; 10 — 11 mm. 



Three specimens from Cape Flattery, Oregon. 



N. virescens, (Chaud. inedit.) — Bluish-green, metallic, shining. Head on 

 each side within and Slightly before the eyes sub-triangnlarly impressed and 

 rugose. Thorax about one-third broader than long, sides broadly rounded in 

 front, oblique behind, hind angles inoderately prominent, but not rectangular; 

 margin moderately broadly reflexed; apical transverse imj^ression very faint, 

 longitudinal impression distinct, basal impressfon broad, rather deep, angular 

 impressions broad, not linear; surface feebly convex, snaooth, sparsely punc- 

 tured at basal margin. Elytra oblong, feebly convex, but not flattened, sides 

 sub-parallel, feebly rounded : surface feebly striate, striae scarcely evident at 

 the sides, distinctly punctured, diseal intervals very feebly convex, third strife 

 with two larger punctures, one in front of middle another about one-third from 

 apex. Body beneath and legs black, smooth and shining. Species winged ; 

 humeri moderately prominent. Length .48 inch ; 12 mm. 



This species may be readily recognised by its color and by the sides 

 of the thorax being nearly rounded from apex to base, being but 

 slightly oblique behind with the angle not rectangular, 



A single specimen is in the cabinet of Dr. Leconte sent probably by 

 M.'Sall^ under the name cited. I know of no description published, 

 and therefore give the characters in detail. The specimen is said to 

 be from Vancouver. 



N. gregaria, Fischer, Ent. Russ. i. 72, pi. 6, fig. 2; Esch. Mem. Mosc. 182.^, 

 vi, p. 101. 



An elongate species, black, with distinct bluish-gi-een metallic tinge. 

 The sides of the thorax are but moderately rounded in front. The 

 basal angles are distinctly rectangular. The elytra are more elongate 

 than any of our species, and are slightly broader behind the middle. 

 The humeri are but feebly prominent, scarcely more so than in diversa. 

 The strise are rather deep, not punctured, the third with five feeble 

 foveas, interspaces convex. Body beneath black, shining, legs piceous- 

 black. Winged. Length .46 inch; 11.5 mm. 



Alaska. One specimen, probably sent by Mannerheim, is in the 

 cabinet of Dr. Leconte. 



N. metallica, Fischer, Ent. Russ. i, p. 71, pi. 6, fig. 1; Esch. Mem. Mosc. 1823, 

 vi, p. 100. 



An abundant species in Russian America, varying in color from 

 violet or cupreous to greenish-metallic. The head and thorax are 

 usually darker than the elytra, sometimes black. The sides of thorax 

 are strongly rounded in front, deeply sinuate behind, with the basal 

 angles rectangular. The lateral margin is broad and moderately re- 

 flexed. Elytra oblong, sides sub-parallel and feebly rounded, surface 



