ClCINDELID^ AND CARABID.E 113 



Form nearly as in the preceding but evidently shorter, feebly convex, 

 moderately shining, dark rufo-piceous, the elytra black and opacu- 

 late, barely less so in the male; head almost three-fourths as wide 

 as the prothorax, the impressions fine, arcuate and diverging, sepa- 

 rated by rather less than twice that of either from the sides; pro- 

 thorax throughout as in the preceding, except that the sides before 

 the basal angles are not so parallel or straight, the sharp angles 

 being evidently obtuse and not right ; elytra as in occultus but broader, 

 more oblong-oval and much shorter, this species belonging to the 

 preceding section in general habitus but to the succeeding in the 

 less elongate elytra, three-fifths to two-thirds longer than wide and 

 about a fourth wider than the prothorax; sides parallel, very feebly 

 arcuate, more rounding at base, moderately obtuse at apex, the 

 striae very fine, impunctate, the intervals flat; legs moderately long 

 and slender, they as well as the entire under surface castaneous. 

 Length (of 1 9 ) 12.8-13.5 mm.; width 4.4-4.9 mm. California 

 (Lake Tahoe) tahoensis n. sp. 



7 Hind angles of the prothorax sharply marked, generally minutely 

 and feebly, denticularly subprominent; body rather deep black in 

 color throughout except in the aberrant miscellus 8 



Hind angles very obtuse, never prominent, sometimes rounded. Southern 

 California coast regions 15 



8 Prothorax only a little though evidently, as a rule, narrower than 

 the elytra 9 



Prothorax much narrower than the elytra in both sexes 13 



9 Size larger, the upper surface strongly convex, deep, shining black, 

 the elytra but just visibly alutaceous; head moderate, the impressions 

 rather feeble, the epistoma and labrum rather strongly sinuate from 

 side to side; prothorax notably large, a fourth or fifth wider than 

 long, rather strongly rounded at the sides almost throughout but 

 more converging posteriorly, only just visibly sinuate near the 

 angles, which are obtuse though rather sharp; base very feebly sinuate 

 in median third, thence transverse and margined to the angles; 

 surface unusually convex and declivous laterally, very finely mar- 

 gined throughout, the inner impression rather long, moderately 

 impressed, not attaining the base, the outer obsolete or very nearly, 

 the intermediate surface convex; elytra oblong-oval, convex, with 

 arcuate sides and rounded apex, one-half longer than wide, only a 

 fifth to sixth wider than the prothorax, the striae very fine, shallow, 

 minutely punctulate along the bottom, the intervals flat; hind 

 tibiae (cf) feebly crenulate within except basally, the tarsi rather 

 stout but with the first joint somewhat longer than the next two. 

 Length (cf 9 ) 12.0-14.5 mm.; width 4.35-5.5 mm. California 

 (vicinity of San Francisco Bay to Humboldt Co.). Very abundant. 

 [amplicollis Mots.; simplex Lee.] californicus Dej. 



Size nearly as in californicus, the body less convex and more oblong, 

 deep black, shining, the elytra not distinctly alutaceous in the male 

 the only sex at hand; head moderate, barely three-fifths as wide as 

 the prothorax, the impressions and labrum nearly as in the preceding, 



T. L. Casey, Mem. Col. IV, Oct. 1913. 



