122 CASEY 



becoming feebly sinuate before the tips, which are as in tacomcB, but 

 with the outer angle more broadly rounded and more even and trans- 

 verse suturally; costae much more feeble than in any of the preceding 

 forms, becoming very low at a little before the centre of each elytron, 

 where the punctures extend almost across them, the interv^ales densely, 

 subevenly cribrate as in lauta; under surface punctured nearly as in 

 lauta but more coarsely and densely so toward the sides, the prosternum 

 rather narrowly and deeply impressed along the median line. Length 

 ( 9 ) 16.5 mm.; width 6.2 mm. Idaho (Coeur d' Alene) . . nupta n. sp. 



10 — Pronotum with coarse punctures coalescent in short isolated irregular 

 series on the median parts, densely but irregularly confluent laterally; 

 general coloration of the upper surface as in lauta 11 



Pronotum with much smaller but deep perforate punctures, not evidently 

 confluent in short series medially, very dense laterally; coloration of the 

 upper surface dull cupreous, the elytra medially broadly cupreo-viri- 

 descent 12 



II — Body oblong, moderately convex, rather stout, the anterior parts more 

 or less cupreous; elytra with bright cupreous inner and outer margins, 

 the remainder bluish-green, the ribs frequently deep indigo; head with 

 longitudinal rugulation caused by the compressed coalescent punc- 

 tures, with a central green divided spot of dense punctures; eyes not 

 at all prominent ( $ ), pale in all examples at hand; prothorax two-thirds 

 wider than long, the sides broadly arcuate, becoming parallel basally, 

 more convergent anteriorly, sometimes slightly sinuate just behind 

 the apex, the latter truncate, broadly and evenly bisinuate; surface 

 broadly and distinctly impressed along the middle; elytra evidently 

 inflated behind the middle and nearly one-half wider than the prothorax 

 to evidently less, scarcely three-fourths longer than wide, the oblique 

 sides posteriorly becoming almost straight, the apices broadly rounded, 

 transverse toward the suture, where the angle is sometimes distinctly 

 spiculose; surface sculptured nearly as in lauta; under surface more 

 strongly punctured, usually coarsely and very densely toward the sides ; 

 prosternum deeply impressed and densely punctate along the median 

 line; females abundant; males rare as usual in this group. Length 

 (9) 16. 5-17. 5 mm.; width 6.5-7.0 mm. California venusta n. sp. 



Body larger and much more elongate, rather more convex, deep green, the 

 anterior parts with but Httle cupreous lustre, the inner and outer mar- 

 gins of the elytra cupreous; head as in the preceding but with the me- 

 dian line more strongly elevated centrally; eyes not at all prominent, 

 rather small; antennae black, metallic basally; prothorax two-thirds 

 wider than long, the sides parallel and subsinuate in nearly basal half, 

 thence moderately convergent and almost straight to the apex, which 

 is truncate, with the sinuations obsolescent; surface broadly, moderately 

 impressed and scarcely more finely though more thickly punctured along 

 the middle, rather pubescent at the sides; elytra almost twice as long as 

 wide, evidently wider than the prothorax, the converging sides poste- 

 riorly not becoming quite straight, the apices very broadly rounded, 



