272 Memoirs on the Coleoptera 



Sides of the prothorax briefly and feebly sinuate at the sharp and minutely 

 subprominent basal angles; dorsal punctures of the elytra two in 



number 2 



Sides deeply sinuate in basal fourth; dorsal punctures three ii 



2 — Prothorax very short, fully three-fourths wider than long. Body 

 black, rather shining but without distinct metallic lustre; under 

 surface and legs black, the coxae piceous; head well developed, 

 four-fifths as wide as the prothorax, with notably broad neck, not 

 longer than wide, the eyes rather large and prominent; surface 

 rugulose or strongly micro-reticulate throughout, with a small 

 central puncture and striole; antennae black as usual, about half 

 as long as the body; prothorax widest at apical third, where the 

 sides are strongly rounded, oblique posteriorly; base equal in width 

 to the neck, the lateral obliquity short but strong; apex broadly 

 sinuate; margins extremely finely reflexed; surface feebly rugose, 

 the impressions obtuse, shallow, the median stria deeply impressed; 

 elytra between a third and fourth longer than wide, parallel, one- 

 half wider than the prothorax, the apices slightly oblique; margins 

 very finely reflexed; striae fine, shallow, slightly uneven, not at all 

 sulciform; intervals somewhat uneven, sparsely micro-punctulate 

 and strongly reticulate though shining. Length 3.25 mm.; width 

 1.25 mm. California (Sonoma Co., Cloverdale). A single female. 



cephalus n. sp. 



Prothorax less abbreviated 3 



3 — Elytral striae very fine, shallow and equal throughout the width, 

 not in the least sulciform. Body rather more depressed than usual 

 and shorter, black, somewhat shining, the elytra dark piceous; 

 under surface and legs black; head scarcely as long as wide, five- 

 sixths as wide as the prothorax, the eyes moderate and but slightly 

 prominent; front smooth, rugulose antero-laterally, the anterior 

 impressions long, striiform and parallel; antennae moderate, less 

 than half as long as the body; prothorax three-fifths wider than 

 long, in outline and general structure nearly as in the preceding; 

 surface smoother, the impressions more nearly obsolete; stria fine, 

 impressed, entire; elytra oblong, parallel, a third longer than wide, 

 a little less than one-half wider than the prothorax, shining and only 

 feebly micro-sculptate, the intervals flat; dorsal punctures distinct, 

 near two-fifths and three-fourths, not closely adjoining the third 

 stria. Length 3.0 mm.; width 1.2 mm. California (Mt. Diablo). 



A single male example, taken by the writer subdeletus n. sp. 



Elytral striae broadly sulciform at least toward the suture 4 



4 — The sulciform striae of the elytra obliterated laterally, rather less 



deep than usual toward the suture; body small in size 5 



The striae more or less conspicuous throughout the width 6 



5 — Upper surface shining and rather brightly aeneous throughout; under 

 surface black, the legs piceous; head fully four-fifths as wide as the 

 prothorax, as long as wide, with moderate but rather prominent eyes; 

 front smooth, rugulose anteriorly, the anterior impressions short; 

 antennae black, half as long as the body; prothorax large, three- 

 fifths wider than long, the sides finely but evidently reflexed, rather 



