STUDIES IN THE AMERICAN BUPRESTID.E 1 23 



becoming somewhat oblique and straight toward the minutely denticu- 

 late sutural angles; surface with the costa: rather more acutely elevated 

 than usual, the concave intervales much more coarsely, confusedly 

 and densely cribrate than in lauta; under surface plentifully pubescent, 

 the presternum narrowly and deeply sulcate, the abdomen not closely 

 but rather strongly punctate, more strongly but not densely so laterally, 

 the general color pale green, aenescent along the median Une. Length 

 19.5 mm.; width 7.3 mm. New Mexico prospera n. sp. 



12— Form elongate, subparallel, rather convex; under surface bright 

 bronze, broadly greenish laterally except on the abdomen; head closely, 

 perforately punctate, the punctures compressed and partially confluent 

 longitudinally, the central densely punctate spot ill-defined, divided by 

 an elevated line; eyes moderate, pale, only slightly prominent; prothorax 

 only three-fifths wider than long, the sides converging and broadly, 

 subevenly arcuate from base to apex; surface scarcely at all impressed 

 along the middle but noticeably so at the base, the punctures much 

 coarser laterally than medially, though not very confluent; scutellura 

 subquadrate, rather well developed; elytra four-fifths longer than wide, 

 a third wider than the prothorax, not at all inflated behind the middle 

 but rather widest across the humeral swellings, the sides very gradu- 

 ally rounding in apical two-fifths, becoming not quite straight at the 

 apices, which are clearly truncate though with the outer angle obtuse, 

 the sutural angles denticulate; costae rather low and broadly convex, 

 the intervales with the dense and crowded punctures regular but unusu- 

 ally deep; prosternum impressed and strongly punctate medially; 

 abdomen finely, remotely punctate, becoming coarsely, shallowly and 

 very densely so laterally. Length ( 9 ) 18.0 mm.; width 6.5 mm. Ore- 

 tron afflnis n. sp. 



Form nearly similar, the coloration similar, except that the under surface 

 is less bronzed and the median parts of the elytra more bluish-green; 

 head more finely and densely punctate, the punctures compressed, the 

 median line fine, elevated; eyes nearly similar; prothorax shorter, two- 

 thirds wider than long, similar in form, the apex bisinuously truncate; 

 surface distinctly impressed anteriorly and more finely, densely punc- 

 tate along the middle but scarcely impressed posteriorly, the punctures 

 generally close-set, extremely dense laterally, with a less punctate 

 longitudinal area basally near lateral fifth or sixth; scutellum much 

 smaller, oblong; elytra a little shorter, the sides more rapidly and 

 arcuately converging behind, becoming subsinuate before the angles, 

 which are rounded, the apices thence transverse to the denticulate sutural 

 angles ; surface sculpture nearly as in the preceding but with more elevated 

 costs, the cribration rather less coarse; under surface more strongly, 

 less sparsely punctate, the punctures coarse and densely crowded 

 laterally; prosternum finely, deeply grooved along the middle, else- 

 where medially impunctate as usual. Length (9) 16.5 mm.; width 

 6.0 mm. California (Yreka) adulans n. sp. 



12— Body rather stout and shorter, of less sombre coloration, the median 

 parts of the elytra always more or less greenish or bluish. Obscure 



