10 CALIFORNIA ACADEMY OF SCIENCES. 



deep. Tins species is easily distinguislied from mobile by 

 its smaller size, sparser pubescence and much sparser punc- 

 tuation. 



6— C. luculentum n. sp.— Form rather robust, depressed; color black, elytral 

 ai:)ices abruptly paler, rufous; apices of the abdominal segments beneath pale; 

 legs pale reddish-ochreous; antennae uniformly dark rufo-fuscous; palpi 

 piceous; head and pronotum almost glabrous; x>ubescence of the elytra and 

 abdomen very sparse, line, dark piceo-fulvous and not at all conspicuous; 

 integuments very highly polished. Head short and robust, very slightly 

 wider than long; sides parallel and very feebly arcuate; base truncate, angles 

 narrowly rounded; surface moderately convex, rather coarsely and densely 

 punctate at the sides and base, very sparsely so in the middle where there is a 

 rather wide median impunctate art a; inteiantennal area impunctate, two 

 setigerous punctures widely separated and very feeble; antennte slender^ 

 nearly as long as the head and prothorax together, second joint scarcely two- 

 thirds as long as the third and distinctly shorter than the fourth, tenth as 

 wide as long. Prothorax quadrate, very slightly wider than the head; sides 

 very feebly convergent from apex to base; the latter broadly, evenly and 

 rather moderately arcuate; apex with a distinct median sinuation; apical 

 angles somewhat narrowly rounded, basal broadly so; disk moderately con- 

 vex, very finely, rather deeply, evenly and densely punctate; punctures sep- 

 arated by their own widths. Elytra at base very slightly wider than the 

 pronotum; sides just visibly divergent posteriorly and feebly arcuate, dis- 

 tinctly more strongly so behind; together broadlj'- and feebly sinuate at apex; 

 disk one-fourth longer than wide and one-third longer than the pronotum, 

 feebly impressed along the slightly elevated suture except at the apex where 

 the elevation and impressions disappear, rather coarsely, sub-asperately and 

 very densely punctate. Abdomen broad, very slightly narrower than the 

 elytra; border narrow; sides parallel and nearly straight; transversely stri- 

 gate in wavy lines. Legs slender; first joint of the posterior tarsi as long as 

 the next two together, second as long as the third and fourth, slightly shorter 

 than the fifth. Length 3.7 mm. 



Lake Co., 3. (Mr. Fuchs.) 



Described from the male; the sixth segment is sinuate at 

 apex, the sinus being acutely rounded and but slightly more 

 than three times as wide as deep. This species, although 

 somewhat resembling contractum, may be at once distin- 

 guished by its broader form, much paler elytral apices, 

 highly polished integuments and very sparse pubescence of 

 the elytra and abdomen. The sinus of the sixth segment, 

 although rather acutely rounded as in coniradum, is relatively 

 distinctly deeper. 



