122 CASEY 



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

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

 verse suturally; costse 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 intervales 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.; vndth 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, vidth 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 

 (?) 16. 5-1 7.5 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 little 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, metaUic basally; prothorax two-thirds 

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

 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, 



