120 Memoirs on the Coleoptera 



striae moderate, grooved, smooth, not distinctly deeper apically; 

 intervals flat, the third with five punctures. Length (cf ) 8.5 mm.; 

 width 3.1 mm. A single example, without label, from the Levette 

 collection and possibly taken in Colorado atromicans n. sp. 



Body more or less ventricose and more convex, the pro thorax more 

 evenly rounded at the sides, sometimes slightly oblique behind the 

 middle but never so conspicuously as in atromicans 16 



16 — Form rather narrow and elongate (cf), much stouter (9), deep 

 black, the male more or less aeneous above, shining, the female 

 elytra feebly alutaceous; head rather elongate, much narrower than 

 the prothorax, with large and rather prominent eyes, the two 

 interocular punctiform foveas obsolete; antennae slender, nearly 

 half as long as the body, the third and fourth joints subequal; pro- 

 thorax parallel, with subevenly and very moderately arcuate, 

 narrowly reflexed sides, which are slightly more reflexed at base, 

 the angles very obtuse and broadly rounded; base arcuate laterally, 

 but little wider than the rather deeply sinuate apex; impressions 

 feeble to obsolete, the stria distinct; surface declivous toward the 

 reflexed margins; foveae elongate, sublinear, deeply impressed, 

 feebly rugulose, traceable to or beyond the middle; surface between 

 the foveae and the sides flat; elytra parallel, three-fifths longer than 

 wide, two-fifths wider than the prothorax, rather obtusely rounded 

 at apex, with long and distinct sinus; striae moderate, grooved, 

 nearly smooth, not deeper at apex; intervals very nearly flat through- 

 out, the third with four or five punctures; anterior male tarsi very 

 distinctly dilated. Female much stouter, blacker, not aeneous, 

 more ventricose; antennae shorter, the prothorax shorter and 

 broader, usually more oblique posteriorly; elytra not quite one- 

 half longer than wide, rather more than one-half wider than the 

 prothorax, the striae and intervals similar, the third interval with 

 six punctures. Length (cf) 8.8-9.2, (9) 9.0-9.6 mm.; width (c^) 

 3.1-3.4 mm., (9) 3.6-3.8 mm. California (San Francisco to 

 Humboldt and also Lake Tahoe). Abundant. [Ag. fameliciim 

 Men. (cf), hrevicolle Dej, (9), rohustum Mots.].. . .fossigerum Dej. 



Form in the female somewhat as in fossigerum ( 9 ) but still a little 

 stouter, deep black, shining, the elytra opaculate; head and an- 

 tennae nearly as in fossigerum; prothorax more quadrate, the sides 

 less oblique behind the middle and evenly, moderately arcuate, 

 only about a fourth wider than long, the basal angles broadly obtuse, 

 rounded; base subequal to the deeply sinuate apex, more oblique 

 at the sides than in the preceding; surface similarly with feeble 

 transverse rugulae, feeble impressions and fine median stria; foveae 

 more widely and feebly impressed, more rugulose and opaculate, 

 with the bottom more finely linear, similarly traceable to the middle 

 of the length; surface thence to the sides perfectly flat; side margins 

 finely reflexed, a little more so at base; elytra nearly one-half 

 longer than wide, not quite one-half wider than the prothorax, 

 somewhat more gradually rounded behind, the sinus distinct; sides 

 rather less rapidly rounded at base; striation nearly similar, the 

 intervals slightly less flat, the third with five punctures; meso- 



