STUDIES IN THE AMERICAN BUPRESTID^E I59 



eyes moderate, rather convex; prothorax four- fifths wider than long, 

 nearly as in the preceding but more narrowed and sinuate basally, 

 the median parts tumid, broadly flattened, sparsely punctate, with a 

 small deep punctured anterior impression and another which is grad- 

 ually rather broadly inflated toward base; sculpture of the depressed 

 lateral parts unusually coarsely, densely punctate; scutellum small, 

 black, opaque, but little wider than long; elytra four-fifths longer than 

 wide, rather evidently wider than the prothorax, the oblique sides 

 posteriorly becoming obviously sinuate before the very briefly prolonged 

 apices, which are obliquely truncate, with the outer angles only nar- 

 rowly rounded; surface finely, very densely punctate, with rows of 

 coarser punctures only evident suturally, where they are rather small 

 though becoming very large along the callous spots, the latter numerous, 

 strong and in large part transversely anastomosing; under surface (9) 

 rugose, the prosternum coarsely and rugosely punctured, broadly 

 and rather deeply concave, the somewhat narrowly rounded apex of 

 the fifth ventral having two minute and rather well separated nicks. 

 Length 14.4 mm.; width 5.5 mm. New York (Lake George). 



chrysea Mels. 



A — Nearly similar in form, size and coloration, the head rather less 

 coarsely but very irregularly punctured and rugose, more impressed 

 along the median line, the eyes similar and generally rather prom- 

 inent; prothorax and elytra nearly similar, the former sometimes 

 nearly twice as wide as long and with an obvious deep median sulcus, 

 which is evidently interrupted by a rounded callus, the elytral tips 

 somewhat more prolonged, the sinuation of the sides toward them 

 similarly very distinct; male with the axial groove of the under sur- 

 face broad, deeply concave, densely sculptured and hairy, the femora 

 also hairy beneath, the fifth ventral rectangularly emarginate, the 

 middle tibiae broadly, angularly dentate internally; female with the 

 axial sulcus narrower, feebler, more coarsely and less densely sculp- 

 tured and much less hairy, the fifth ventral nearly as in chrysea, the 

 median tooth very variable in width. Length (J*, 9) 13. 8-16. 7 

 mm.; width 5.0-6.0 mm. Lake Superior (south shore from Duluth 

 to Whitefish Point). [= tenehrosa Lee. et Cr., nee Kirby]. 



bifoveata Lee. 



B — Form nearly as in bifoveata, except that the eyes are relatively smaller 

 and not at all prominent, the prothorax similar but with the sculpture 

 of the depressed lateral parts much less coarse, very dense and more 

 even, very nearly twice as wide as long; elytra similarly less than 

 tvnce as long as wide but more inflated behind the middle, the sides 

 behind more rapidly oblique, the apices less prolonged though sim- 

 ilarly truncate at tip, the sinuation of the sides nearly as evident and 

 the general sculpture of the surface finer, more shallow and still 

 more confused; under surface ( 9) nearly similar but with the nicks 

 at the apex of the fifth ventral subobsolete. Length 14.7 mm.; 

 width 5.5 mm. Michigan mystica n. subsp. 



Body much larger and somewhat more parallel or with relatively larger 

 Proc. Wash. Acad. Sci., April, 1909. 



