488 Memoirs on the Coleoptera 



the prothorax, the antennae at four-sevenths, where the beak is 

 gradually and feebly bent; prothorax nearly as in rivularis but 

 somewhat more finely punctate; elytra two-fifths longer and per- 

 ceptibly wider than the prothorax and twice as long (cf), or more 

 (9), the sides parallel, obtusely rounded in nearly apical half; 

 striae and intervals almost as in rivularis in form and sculpture, but 

 with the latter slightly convex; male with the abdominal basal im- 

 pression very faint, the prosternum perforately fossate, with two 

 very moderate spines, extending but little more than half way to 

 the apex. Length (ic^, 49) 2.8-3.1 mm.; width 1.15-1.25 mm. 



Louisiana (Covington) difficilis n. sp. 



24 — Male with two short prosternal spines 25 



Male with the prosternal spines long and porrect; body much stouter 



in form 26 



Male without trace of prosternal spines and only feebly impressed. . .27 

 25 — Prothorax much shorter than wide; beak unusually short in both 

 sexes; body narrow, convex, deep black and somewhat shining; 

 beak (cf) rather thick, evenly, feebly arcuate, dull and densely 

 sculptured, not as long as the prothorax, or (9), more slender, 

 feebly arcuate, rather strongly sculptured and about as long as the 

 prothorax; antennae at four-sevenths (cf) or barely bej'ond the 

 middle ( 9 ) ; prothorax between a fourth and third wider than long, 

 the subparallel and feebly arcuate sides more rounding anteriad, 

 the tubulate apex much more than half as wide as the base; punc- 

 tures small and rather sparse, the smooth line not entire; elytra a 

 little more than one-half longer than wide, much wider than the 

 prothorax and two and one-half times as long; grooves narrow; 

 intervals between three and four times as wide as the grooves, with 

 very fine and remote punctures in single series; male abdomen 

 distinctly impressed medio-basally, the prosternal pit very deep, 

 the spines semi-erect. Length (cf 9) 2.7-2.85 mm.; width 1.15- 



1.2 mm. Indiana and Kansas puteifera Csy. 



Prothorax subcylindric, narrow and as long as wide; beak less abbrevi- 

 ated; body rather strongly shining, deep black; beak in the male 

 rather shining, though somewhat closely sculptured, thick, evenly 

 but barely visibly arcuate and fully as long as the head and pro- 

 thorax, the antennae near three-fifths; prothorax with the parallel 

 sides feebly arcuate, slightly more so apically, the tubulate apex 

 broad, two-thirds as wide as the base; punctures small but rather 

 deep and distinct, well separated, the smooth line as in the pre- 

 ceding; surface more shining; elytra shorter, only a third longer 

 than wide, two-sevenths wider than the prothorax and twice as long, 

 the parallel and nearly straight sides rounding behind the middle, 

 the humeral callus feeble; striae moderate, deep; intervals almost 

 three times as wide as the grooves, with irregularly single series 

 of fine and very feeble, rather well separated punctures; male with 

 the abdomen distinctly impressed medially through the first two 

 segments; prosternum nearly as in the preceding. Length (cf) 

 2.65 mm.; width 1.15 mm. Illinois (locality unrecorded). 



sectator n. sp. 



