24 MEMOIRS ON THE COLEOPTERA 



joints between two and three times as long as thick; palpi moderate; 

 head well developed, fully three-fourths as wide as the prothorax, 

 which is three-fifths wider than long, with acute though slight!}' 

 blunt apical angles, widest just before the middle, the sides rather 

 more rounded submedially; base wider than the apex and but little 

 narrower than the greatest width; fovese very large, rather shallow, 

 rugose, having a lineate sulcus at the bottom, the carina long; 

 elytra scarcely one-half longer than wide, two-fifths wider than the 

 prothorax, oblong, with arcuate sides, obtusely rounded in apical 

 third; striae extremely fine, barely at all impressed inwardly, scarcely 

 traceable externally, the large foveae at about basal and apical 

 third. Length (9) 4.1 mm.; width 1.8 mm. California (Placer 

 Co.), Koebele saturatum n. sp. 



Form oblong, less convex, polished, black, with feeble purpureo-seneous 

 lustre; legs black, the coxae not paler; antennae long, rather slender, 

 four-fifths as long as the elytra, the medial joints three times as 

 long as wide, the tenth barely at all shorter; palpi black, distinctly 

 longer than in the preceding; head moderate, three-fourths as wide 

 as the prothorax, which is short and very transverse, two-thirds 

 wider than long, with very obtuse and rather rounded apical angles, 

 the large unimpressed scabrous area inward from the very long 

 carina, having a lineiform deep impression at some distance from 

 the latter; base wider than the apex, the sides but slightly inflated, 

 subevenly rounded, feebly oblique behind; elytra oblong-oval, sub- 

 circularly rounded in fully apical third, one-half longer than wide, 

 fully a third wider than the prothorax, parallel, with broadly arcu- 

 ate sides; striae entire, fine but deeply impressed inwardly and very 

 distinct throughout the width, though feebler externally, the foveae 

 at basal and apical third. Length (cf) 5.2 mm.; width 2.0 mm. 

 California (Placer Co.). The first anterior tarsal joint is very large, 

 fully as long as the next three and one-half longer than wide. 



laxatum n. sp. 



14 Elytra broad, oblong, with nearly straight sides, rapidly and very 

 obtusely rounding behind in barely apical third. Body and legs 

 black, the upper surface polished and more or less metallic, the 

 elytra dark green; head three-fourths as wide as the prothorax and 

 fully as wide as an elytron, the antennae black, almost as long as 

 the elytra, the medial joints slightly more than twice as long as 

 wide; palpi black, moderate in length; prothorax short, very trans- 

 verse, not quite three-fourths wider than long, the apical angles 

 obtuse and rounded, the basal nearly right and sharp; sides 

 broadly, moderately arcuate, slightly oblique and just visibly sinu- 

 ate basally; base slightly wider than the apex; surface at base rugose 

 and flat laterally between the long carina and a long lineiform im- 

 pression; side margins very broadly reflexed; elytra less than one- 

 half longer than wide, about a third wider than the prothorax, the 

 striae throughout extremely fine, feeble and unimpressed, almost 

 entire, barely traceable laterally, the dorsal foveae broadly im- 

 pressed, near two-fifths and three-fourths. Length (cf) 4-3 mm.; 

 width 1.9 mm. Colorado ampliatum n. sp. 



