n8 MEMOIRS ON THE COLEOPTERA 



slightly scabrous, remote from the carina, which is moderate though 

 distinct; elytra oblong, with arcuate sides, barely one-half longer 

 than wide, hardly one-half wider than the prothorax; striae entire, 

 very fine, scarcely at all impressed, the punctures very fine, barely 

 traceable to about apical third, the seventh series similar to the 

 others; foveae strongly asperate, rather before basal and at apical 

 third. Length (9) 4.0 mm.; width 1.65 mm. Arizona (Tugson). 

 A single example, taken by the writer lassulum n. sp. 



54 Larger species, the sharply marked pale elytral maculation forming 

 an oblong and externally open ring about the humeri, more or less 

 expanding toward the margin near basal third the ring apparently 

 incomplete basally in cordatnm and also with a posterior narrow 

 fascia and the apex pale 55 



Smaller species, the elytral maculation of the patruele order 56 



Smaller and more elongate species, with the elytral maculation almost 

 entirely confined to posterior third, rarely in great part wanting. .57 



55 Form very' stout, only slightly convex, black, with greenish lustre 

 above, excepting the pale elytral maculation, shining, the elytra 

 more or less alutaceous; under surface black, the legs obscure rufous; 

 head large, with prominent eyes, almost four-fifths as wide as the 

 prothorax, the sulci broad, rather shallow; antennae only two-thirds 

 as long as the elytra, thick, blackish throughout, the medial joints 

 barely twice as long as wide; prothorax short, nearly three-fifths 

 wider than long, the sides very strongly rounded, well reflexed, very 

 oblique behind, rapidly sinuate basally, parallel for a short distance 

 in front of the sharp angles; surface shining but rugulose basally and 

 densely scabrous postero-laterad, the impressions distinct; foveae 

 large and shallow, with a small and slightly deeper median linear 

 part, the carina not very long but distinct; elytra broad, not one- 

 half longer than wide, nearly one-half wider than the prothorax, 

 parallel, with broadly arcuate sides, rapidly very obtuse behind; striae 

 entire, fine, not impressed, rather finely but strongly, somewhat 

 closely punctate, the small foveae slightly before the middle and near 

 apical fourth. Length (c/ 1 9 ) 5.8-6.5 mm.; width 2.4-2.6 mm. 

 California (San Diego, Los Angeles and Alameda).. .insulatum Lee. 



Form not so broad and rather more convex, shining, the elytra slightly 

 alutaceous, black, with feeble subaeneous lustre, the pale maculation 

 as described above normally, but sometimes almost wholly wanting, 

 excepting the basal and apical areas; under surface black, the legs 

 piceous; head large, with prominent eyes and wide, somewhat shal- 

 lowly impressed sulci; antennae as in insulatum but not quite so 

 thick, black as a rule, or each joint may be rufescent basally, the 

 medial joints slightly more than twice as long as wide; prothorax 

 less transverse and not quite so strongly rounded at the sides, but 

 otherwise nearly as in the preceding, except that the foveae are rather 

 shallow and very irregularly impressed, without deep linear part, the 

 carina rather long and strong; elytra much less broad, slightly more 

 than one-half longer than wide, more strongly rounded behind, par- 

 allel and broadly arcuate at the sides, scarcely a third wider than the 

 prothorax, the striae rather fine, not impressed, with small but dis- 



