AMARIISLE 309 



Elytra about equal in width to the prothorax, the pronotum occasionally 

 with peculiar punctures apically and basally 29 



29 Color above bright aeneous, rarely metallic greenish or bluish, oblong- 

 oval, similarly convex; under surface black to piceous; legs black, 

 the tibiae obscure rufous; head rather distinctly more than half as 

 wide as the prothorax, otherwise nearly as in convexa throughout; 

 prothorax three-fourths wider than long, in outline nearly as in the 

 preceding but with relatively somewhat wider and less deeply sinu- 

 ate apex; surface usually completely impunctate, but occasionally 

 there are scattered punctures along the obsolete anterior impression 

 and in about two regular lines of similar punctures along the middle 

 of the feeble posterior impression, the lines parallel to the base, 

 somewhat as in the next species; elytra longer than in convexa, more 

 than two-fifths to about one-half longer than wide; striation nearly 

 as in' convexa, the seventh usually more distinct, but the sixth and 

 seventh are frequently finely comminuted, apparently as though 

 punctulate. Length (cf 9 ) 5.5-7.0 mm.; width 2.15-2.8 mm. 

 Colorado (Boulder Co.) and at Akron. Rather abundant. 



polita Lee. 



Color above black, with feeble violaceous lustre, the entire elytra rufo- 

 piceous, without metallic lustre; under surface piceous; legs rufous, 

 the femora picescent; tarsi rufous; form more broadly oblong than 

 in polita, only moderately convex; head half as wide as the prothorax, 

 the eyes well developed, rather prominent, the strioles short, linear, 

 very oblique; antennae slender, piceous, the three basal joints tes- 

 taceous, not extending to the thoracic base; prothorax more than 

 three-fourths wider than long, the arcuate sides straighter and par- 

 allel in about basal half; apex fully two-thirds as wide as the base, 

 the sinus moderate, the angles very broadly rounded; impressions 

 subobsolete, the anterior in the type with numerous coarse but shal- 

 low punctures, the posterior with two transverse straight series, 

 exactly parallel to the base, of similar but close-set punctures which 

 extend across the median parts from one inner fovea to the other; 

 foveae deeply impressed; elytra two-fifths longer than wide, about 

 equal in width to the prothorax, obtusely rounded behind, the lat- 

 eral series not interrupted; striae moderately fine, feebly impressed 

 suturally, not coarser behind, everywhere finely but obviously punc- 

 tulate, the seventh feebler and finer than the others, the scutellar 

 rather long, not free; intervals flat, feebly convex suturally; hind 

 tarsi very long and slender. Length (cf ) 6.4 mm.; width 2.8 mm. 

 New Mexico (Las Vegas). One example piceola n. sp. 



30 Sides of the prothorax very moderately and evenly arcuate from base 

 to apex, somewhat as in impuncticollis. Rather stout, oblong-oval, 

 convex, shining, the female elytra strongly micro-reticulate and dull; 

 upper surface with scarcely any metallic lustre; under surface and 

 legs throughout obscure rufous or piceous; head fully half as wide as 

 the prothorax, with rather feebly convex eyes and short oblique 

 strioles; antennae slender, feebly compressed, extending to the tho- 

 racic base, black, the two basal joints dark rufous, clouded with black- 

 ish above; prothorax one-half wider than long, to barely more (9 ), 



