258 Trans. Acad. Sci. of St. Louis. 



joint somewhat shorter than the next two, which are equal as usual ; 

 prothorax distinctly longer than wide and evidently narrower than the 

 head, the sides rather evenly rounded andsubprominentapically, thence 

 moderately converging and just visibly arcuate for a long distance to 

 the base, the latter nearly four-flfths as wide as the disk, which Is 

 widest between apical third and fourth; punctulation extremely fine, 

 sparse, scarcely at all asperulate, the sulcus all but obsolete ; elytra 

 nearly as in occidua, the punctulation sparse, extremely fine, not asper- 

 ulate; abdomen parallel with broadly arcuate sides, not as wide as the 

 elytra, sparsely, very finely punctulate throughout, scarcely at all asperu- 

 late, the basal impressions with but few coarser punctures, the third 

 almost completely impunctate. Length 2.4 mm.; width 0.52 mm. 

 California (Sonoma Co) evanescens n. sp. 



5 — Body rather slender, strongly convex, polished, piceo-rufous, the 

 abdomen and antennae slightly darker, the latter toward base and legs 

 throughout pale testaceous; vestiture fine, subpruinose; head wider 

 than long, broadly subtruncate at base with widely rounded angles, the 

 sides parallel; punctulation sparse and obsolete, scarcely more visible 

 at base; antennae nearly as in occidua but with the third joint slightly 

 longer than the second, the three penultimate transverse; prothorax 

 large, suboval, as wide as the head, longer than wide, widest at apical 

 two-fifths, where the sides are broadly rounded and scarcely at all 

 prominent, thence rather feebly converging and somewhat arcuate to 

 the base, which is unusually arcuate and four-fifths as wide as the 

 disk, the angles obtuse and slightly rounded; surface minutely, obso- 

 letely and sparsely punctulate, the sulcus extremely fine and feeble ; 

 elytra relatively small, two-fifths wider and not at all longer than the 

 prothorax, minutely, obsoletely punctulate; abdomen arcuate at the 

 sides, widest somewhat behind the middle, where it is very obviously 

 wider than the elytra, extremely minutely, somewhat closely punctulate 

 and pubescent, the punctures very finely but abruptly asperulate 

 throughout, the impressions with coarser but feeble punctures, some 

 seven or eight in the first, the third impunctate. Length 2.7 mm.; 

 width 0.67 mm. California (Humboldt Co. — Hoopa Valley). 



collaris n. sp. 



Body smaller and much more slender, rather less convex, similarly colored 

 and pubescent; head nearly similar but smaller, more arcuate at base 

 and broadly, obsoletely impressed along the median line basally, the 

 punctulation similarly obsolete and sparse, becoming less sparse but 

 asperulate on the occiput; antennae nearly similar, attaining the middle 

 of the elytra; prothorax very slightly elongate, equal in width to the 

 head, in outline as in collaris, the hind angles equally obtuse but 

 scarcely rounded, the punctulation very fine, feebly afperulate and 

 sparse, except rather broadly along the median line, where the surface 

 becomes more broadly impressed than usual toward the very feeble 

 sulcus and more closely and coarsely, asperately punctate; elytra very 

 small, about a third wider than the prothorax and barely as long, the 

 sides distinctly diverging from base to apex and very feebly arcuate, 

 the punctures very fine, moderately close-set and somewhat distinctly 

 asperulate; abdomen nearly as in collaris, 'with arcuate sides, much 



