28o Memoirs on the Coleopter.\ 



Strial intervals with strong punctures, forming more or less irregular 

 single series; body deep black, polished, the thoracic angles obtuse, 

 bluntly rounded at tip. Mexico 6 



Strial intervals with moderate though very distinct punctures, confused 

 in arrangement throughout the width of each; thoracic angles 

 obtuse, bluntly rounded 7 



4 — Elytra and the entire upper surface polished. Body rather small, 

 piceous, diaphanously paler at the sides; under surface piceous, the 

 legs testaceous; head nearly as in the preceding, the antennae 

 fuscous, clearer basally, slender, more than half as long as the body; 

 prothorax as in the preceding but rather shorter, two-fifths wider 

 than long, less rounded at the sides behind the middle and with the 

 basal angles not broadly rounded but very obtuse, with the tips 

 evident and barely even blunt, there being often a short and very 

 faint sinus in front of them; median line broadly, deeply and 

 evenly impressed, attaining the base and very nearly the apex; 

 elytra oblong, nearly similar in outline but with more arcuate sides 

 and more broadly rounded external angle at apex, two-thirds wider 

 than the prothorax, the striae rather deeply impressed, minutely 

 but clearly, closely punctulate; intervals not quite flat, the punctules 

 of the series widely spaced and extremely fine and feeble; dorsal 

 punctures coarse, at one-third and three-fourths. Length 7.8 mm.: 

 width 3.1 mm. Canada (Ontario), Pennsylvania and Rhode 

 Island fuscata Dej. 



Elytra alutaceous or opaculate, the micro-reticulation distinct; re- 

 mainder qf the surface above and below polished; basal thoracic 

 angles prominent, with very sharp tips 5 



5 — Color pale rufo-testaceous, the elytra nearly black, nubilously reddish 

 toward base, the abdomen black posteriorly; legs obscure rufous, 

 the femora flavescent; head more than three-fourths as wide as the 

 prothorax, elongate, with prominent eyes, the surface sparsely 

 punctulate, uneven antero-laterally, the anterior superciliary punc- 

 ture very coarse; antennae fusco-testaceous, slightly longer than 

 the head and prothorax, the latter three-sevenths wider than long, 

 widest before the middle, with broadly rounded sides, becoming 

 oblique behind and broadly, strongly reffexed, a little less broadly 

 at apex; base broadly arcuate, abruptly less so at the sides; surface 

 with some feeble transverse rugulosity, minutely, sparsely punctu- 

 late, more distinctly and less sparsely peripherally; base distinctly 

 depressed; anterior impression almost obsolete; median line deeply 

 impressed, greatly biabbreviated ; elytra somewhat over one-half 

 longer than wide, oblong, with arCuate and strongly reflexed, dia- 

 phanously rufous sides, three-fifths Avider than the prothorax, the 

 apical truncature oblique, in part sinuate, with broadly rounded 

 external angle; striae fine, even, shallow, minutely, strongly and 

 closely punctulate; intervals flat or alternately feebly convex, each 

 with a single series of extremely fine, feeble, widely separated 

 punctures; two dorsal punctures small, at three-sevenths and three- 



