144 Memoirs on the Coleoptera 



Prothorax not materially wider at the middle than at base; size larger. . . 2 



Prothorax distinctly wider at the middle than at base, generally more 

 abbreviated; size smaller; antennae relatively more elongate 3 



2 — Form oblong-suboval, convex, strongly shining and bright cupreo- 

 seneous above, slightly picescent and not metallic beneath, the legs 

 dark rufous; head shorter than wide, scarcely three-fifths as wide 

 as the prothorax, the eyes moderate in size and prominence, the 

 surface evenly convex, smooth, the epistomal suture deeply sinuate; 

 palpi and antennae piceo-rufous, the latter a third longer than the 

 thoracic width, shining, with short sparse hairs; prothorax three- 

 fifths wider than long, the sides finel}' reflexed or beaded, parallel 

 and just visibly sinuate in less than basal half, feebly arcuate and 

 converging thence to the small and bluntly prominent apical angles, 

 the basal right and well defined; base transverse, wider than the 

 broadly sinuate apex; surface smooth, with a moderate and slightly 

 punctulate transverse impression near the base, merging into the 

 broadly concave punctate foveae, which are bounded externally by a 

 strong oblique carina; scutellum well developed, transversely and 

 obtusely ogival; elytra very little wider than the prothorax, with 

 feebly arcuate sides, gradually ogivally narrowing in somewhat less 

 than apical half; striae unimpressed, visible only internally and 

 consisting of series of moderate and well separated punctures, 

 becoming very fine externally, the scutellar series long, extending 

 between the suture and the first regular series; apex obliquely 

 impressed, the impression bounded externally by a cariniform ele- 

 vation; under surface and rather short legs smooth, glabrous, the 

 legs with a few short bristles. Length 5.7-5.8 mm.; width 2.5 mm. 

 California (Siskiyou Co.), — Koebele. East of Fort Colville [about 

 300 miles to the northeast of Siskiyou Co.], — LeConte. . .gibbsi Lee. 



Form narrower, nearly similar in coloration and lustre, the antennae and 

 palpi black but otherwise nearly similar, the latter rather more 

 slender; head as in gibbsi, the prothorax distinctly shorter and 

 more transverse, fully three-fourths wider than long, the sides 

 basally straight and very slightly converging posteriad, the base 

 more visibly narrower than the maximum width; general form 

 similar, the apical angles rather less prominent; transverse sub- 

 basal impression subobsolete, the foveae broadly concave, less punc- 

 tate and more distinctly duplex, the bounding oblique prominent 

 line subsimilar; side margins similarly with three setae, one at each 

 angle and the third near apical third; scutellum still broader, 

 being a third as wide as an elytron, the elytra one-half longer than 

 wide, not evidently wider than the prothorax; apex less acutely 

 pointed than in gibbsi, the other characters nearly similar. Male 

 with the first two joints of the anterior tarsi very moderately dilated, 

 the second the smaller and as long as wide. Length 4.8-5.0 mm.; 

 width 2.0-2.12 mm. California (Lake Tahoe). Two examples, 

 taken by the writer alticola n. sp. 



3 — Prothorax less abbreviated, scarcely two-thirds wider than long, the 

 punctured transverse subbasal impression feeble, completely inter- 

 rupted at the middle. Body oblong, convex, polished and bright 



