258 MEMOIRS ON THE COLEOPTERA 



head very densely punctate; antennae (cf) fully one-half as long as 

 the body, slender, black, moderately pubescent, the second joint 

 one-half longer than wide and nearly three-fourths as long as the 

 third, fifth scarcely swollen, sixth very much shorter and also dis- 

 tinctly shorter than the seventh, tenth one-half longer than wide; 

 prothorax nearly as in mcestum but not impressed; scutellum as in 

 the preceding; elytra finely, extremely densely punctate and opaque, 

 the usual costulation feeble; under surface shining, finely but rather 

 closely punctulate and distinctly puberulent; hind tarsi nearly as 

 in mcestumbut more slender. Length (cf) 12.0 mm.; width 3.6 mm. 

 Wisconsin (Bayfield), Wickham gracilicorne n. sp. 



5 Form stouter than in mcestum, deep black throughout, rather dull; 

 head small, densely punctate; antennae (9) moderately stout, ex- 

 tending a little beyond the base of the elytra, the pubescence mod- 

 erate but very stiff, dark fulvous, last six joints abruptly shorter 

 as usual and gradually diminishing to the tenth; prothorax well 

 developed, almost as wide as the elytra, more than one-half wider 

 than long, evenly rounded at the sides and more narrowed basally 

 than apically, the apex broadly, evenly sinuate; surface even, be- 

 coming broadly concave medially but not toward apex, the granules 

 very small and everywhere dense; scutellum subquadrate, shining, 

 rather sparsely punctate; elytra parallel, arcuately narrowing in 

 about apical fourth, the apices not very obtuse; surface minutely and 

 closely punctate, much more finely and rather less closely than in 

 mcestum; under surface shining and punctulate; hind tarsi slender, 

 nearly as in the preceding but black. Length (9) 14.0 mm.; width 

 4.3 mm. Lake Superior (locality unrecorded) ebenum n. sp. 



Form a little narrower than the preceding, much smaller in size and more 

 shining, deep black throughout; antennae (9) similar but a little 

 longer, extending to basal fourth of the elytra; prothorax smaller, 

 much narrower than the elytra and less transverse, not quite one- 

 half wider than long, less broadly rounded and almost angulate at 

 the sides behind the middle, truncate and not sinuate at apex, 

 more coarsely and confusedly sculptured, evenly convex, the median 

 line just visibly and narrowly impressed centrally; scutellum smaller, 

 much less obtuse, broadly pointed at tip, similarly shining and loosely 

 punctate; elytra arcuately narrowing more abruptly in apical fourth 

 or fifth, rather shining, the punctures very fine and distinctly sep- 

 arated, unusually rough, the two median costules strong, the inter- 

 vals confusedly and coarsely undulato-rugose; under surface shining, 

 similarly punctulate but with the hairs still shorter, finer and less 

 distinct. Differs distinctly from ebenum in the form of the exposed 

 last dorsal segment, which is here nearly twice as wide as long, evenly 

 rounded, with the surface ovally impressed at each side; in ebenum 

 this segment is about as long as wide, very much more narrowly 

 rounded, with the lateral impressions very much longer. Length 

 (9) II. o mm.; width 3.3 mm. Wisconsin (Bayfield), Wickham. 



curtipenne n. sp. 



Form, color and sculpture nearly as in mcestum but very much shorter, 

 piceous-brown, dull; vestiture even, rather close, short and coarse; 



