184 MEMOIRS ON THE COLEOPTERA 



infumate and moderately dilated distally, thinner and yellow bas- 

 ally; prothorax relatively very moderate in size, two-fifths wider 

 than long, widest at two-fifths from the apex, the sides rounded, 

 oblique and nearly straight in about basal half; base distinctly wider 

 than the apex; subbasal sulcus unusually arcuate, feebly subcrenate 

 but not clearly punctate, rather widely interrupted at the middle, 

 the medial puncture strong; foveae small, rather deep, not far from 

 the small but evident carina; elytra elongate, three-fifths longer 

 than wide, nearly three and one-half times as long as the prothorax 

 and almost one-half wider, parallel, with broadly arcuate sides, 

 rather obtusely parabolic in about apical third; humeri unusually 

 rapidly rounded; deep sutural stria abbreviated at base, the second 

 distinct but not so strong and greatly biabbreviated, both with 

 feeble crenulation but without distinct punctures of any kind; foveae 

 rather widely impressed, near basal and apical third. Length 2.1 

 mm.; width 0.8 mm. Arizona (Riverside), Wickham. Three sim- 

 ilar examples apacheana n. sp. 



Body darker in tint, most often deep black, sometimes with a feeble 



posterior reddish cloud on each elytron 15 



15 Body elongate in form. Pacific coast regions 16 



Body short and much more ventricose as a rule. Atlantic regions.. . . 17 

 16 Form subparallel, with rather small anterior parts, dark red-brown 

 in color, the elytra black throughout; under surface piceous, the 

 legs rufous; head almost two-thirds as wide as the prothorax, with 

 well developed and rather prominent eyes; antennae fusco-testaceous, 

 clearer basally, slender, three-fifths as long as the elytra; prothorax 

 two-fifths wider than long, widest slightly before the middle, the 

 sides strongly rounded, oblique behind, becoming feebly sinuate 

 near the sharp and subprominent angles; base wider than the apex, 

 subbasal sulcus with a regular row of small punctures, interrupted 

 medially, where there is a strong median puncture; the ends of the 

 punctured series are rather deeper, producing the appearance of 

 three punctures in some cases; foveae small; carina short and ob- 

 lique; elytra three-fifths longer than wide, about one-half wider than 

 the prothorax, the sutural stria much abbreviated basally, the sec- 

 ond distinct; foveae rather large, before basal third and near three- 

 fifths. Length 1.8-2.4 mm.; width 0.75-0.9 mm. California (Sta. 



Cruz to Sonoma) sedula n. sp. 



Form nearly similar but much broader, the coloration similar; head three- 

 fifths as wide as the prothorax, the eyes not quite so large, convex; 

 antennae similar, moderately and very gradually incrassate distally; 

 prothorax more transverse, one-half wider than long, otherwise as 

 in sedula, the deep subbasal sulcus closely punctate, widely and ab- 

 ruptly interrupted medially, the median puncture strong; elytra 

 broader, about one-half longer than wide, evidently less than one- 

 half wider than the prothorax, similarly rather rapidly subobtusely 

 rounded behind; striation similar, except that the sutural stria comes 

 nearer to attaining the base and, that outside the second stria, an 

 excessively fine third line is sometimes glimpsible and externally tan- 



