STUDIES IN THE AMERICAN BUPRESTID^ I47 



ing, the sinus then becoming narrower. Length 15.7-20.5 mm.; 

 width 5.2-6.7 mm. Michigan, Indiana, New York (Adirondacks) 

 and New Hampshire subcuprea n. sp. 



A — Similar to the preceding but in the male narrower and more parallel, 

 the elytra not wider than the prothorax, narrowing more rapidly 

 in about apical third and drawn out at apex to a narrower but sim- 

 ilarly gradual prolongation, the prosternal channel wider than in 

 subcuprea (d^), leaving much narrower lateral ridges, the meta- 

 sternum also with an evidently broader and less posteriorly attenuated 

 furrow. Length (cJ*) 17.7 mm.; width 5.4 mm. New Hampshire. 



pertinax n. subsp. 



Form slightly stouter, convex, shining, grayish-metallic, not at all cupreous 

 above though bronzed beneath; head nearly as in subcuprea but more 

 impressed along the median line almost throughout, the eyes only 

 moderately developed, somewhat prominent; prothorax less transverse 

 though rather more than three-fourths wider than long, nearly similar in 

 outline though much less sinuate at the sides basally; surface deeply 

 but not very broadly sulcate along the median line, the sulcus more 

 closely punctured as usual, very coarsely, extremely densely and con- 

 fusedly punctured laterally, with an occasional callous spot, the oblique 

 impressions not so deep as in the preceding; elytra somewhat more 

 inflated, and, behind the middle, fully a fourth wider than the pro- 

 thorax, the sides very gradually rounding behind, becoming similarly 

 gradually and broadly sinuate to the tip of the moderate prolongation, 

 which is more broadly obtuse at apex; surface with rather coarse sub- 

 sulciform series of coarse punctures, the sculpture dense and very con- 

 fused laterally, the subsutural carina posteriorly sharply defined but 

 elsewhere with very confused and irregular elevated spots and having 

 but few well defined areolae; under surface as usual in this group, the 

 medial apical tooth ( 9 ) very short and broad, triangular. Length 

 ( 9 ) 20.5 mm. ; width 6.8 mm. Colorado sulcatula n. sp. 



18 — Body larger, stout and convex, moderately shining, obscure bronze, 

 brighter beneath ; head very coarsely and confusedly rugose, with abroadly 

 impressed median line interrupted centrally by a V-shaped callus ; eyes 

 well developed but rather feebly convex, scarcely at all prominent; 

 prothorax nearly as in the preceding but relatively smaller, the sides 

 behind the middle parallel and' deeply sinuate nearly as in subcuprea, 

 the surface not impressed though more plentifully punctate along the 

 middle, except the usual subapical spot, the basal pit with sloping pos- 

 terior surface, the sculpture laterally very much confused, being a 

 mixture of coarse and dense punctures and large ramifying callous 

 areas; elytra at base distinctly wider than the prothorax, the sides 

 nearly straight, gradually rounding and converging in posterior two- 

 fifths, the gradually formed cuprascent prolongation unusually short 

 and broad, with the sutural angles minutely aciculate; surface with 

 distinct close-set punctures which are only partially confused near the 

 sides, the black callous spots numerous and strongly elevated, giving a 

 coarsely rugose general surface, the series not much impressed but 



