Baring 489 



26 — Body rather stout, oblong-suboval, convex, deep black, somewhat 

 shining, a little more so in the male; beak in that sex just visibly 

 arcuate, strongly sculptured, moderately thick and about as long 

 as the prothorax, or (9 ), very slender, similarly very feebly, evenly 

 arcuate, almost smooth and not quite as long as the head and pro- 

 thorax; antennae at the middle (9), or at four-sevenths (cT); 

 prothorax slightly shorter than wide, the sides very feebly con- 

 verging (9) or parallel (cf), feebly, subevenly arcuate, gradually 

 more so anteriorly, the feebly constricted apex half as wide as the 

 base, somewhat less in the female; elytra only two-fifths longer 

 than wide, a fifth wider than the prothorax and a little more than 

 twice as long, parallel, obtusely rounded in apical half; stri^ moder- 

 ately coarse; intervals between two and three times as wide as the 

 grooves, with fine and loose punctuation, generally in single series 

 but confused on the second, third and fifth, less so in the male, 

 the intervals subequal in width throughout; male abdomen feebly 

 impressed medially at base, the prosternum with a deep perforation, 

 the spines extending far beyond the thoracic apex. Length (cf 9 ) 

 3.2-3.5 mm.; width i. 25-1. 6 mm. Indiana, Illinois and Missouri. 



convexula n. sp. 

 27 — Form narrower than in convexula, elongate-oval, convex, feebly, the 

 elytra more strongly, shining, deep black throughout; beak (c?) 

 only moderately stout and sculptured, straight, bent slightly at the 

 antennal insertion at three-fifths, as long as the prothorax, or (9), 

 very slender, nearly smooth, evenly and very moderately arcuate 

 and distinctly longer than the head and prothorax, the antennae 

 medial; prothorax slightly shorter than wide, the subparallel sides 

 broadly arcuate, the subtubulate apex a little more than half as 

 wide as the base; punctures moderate, well separated, the smooth 

 line as in the preceding species; elytra almost one-half longer than 

 wide, a fourth to fifth wider than the prothorax and distinctly more 

 than tvvice as long, subparallel, rounding in apical half; grooves 

 moderate; intervals from two to three times as wide as the grooves, 

 with single or confused series of small but evident, well separated 

 punctures; male abdomen broadly impressed at the middle of the 

 first segment; prosternum feebly impressed. Length (cf 9 ) 

 2.65-3.1 mm.; width i. 0-1.28 mm. District of Columbia. 



concurrens Csy. 



28 — Body comparatively stout 29 



Body notably slender : 31 



29 — Prothorax large, only very slightly narrower than the elytra. Body 

 oblong-suboval, convex, shining, deep black throughout; beak in 

 the male rather thick, somewhat closely sculptured, just visibly 

 arcuate and as long as the prothorax, the antennae near three-fifths; 

 prothorax between a fourth and third wider than long, the sides 

 broadly arcuate, becoming nearly straight and parallel in about basal 

 half; punctures rather strong, moderately well separated, with a 

 smooth discal spot at each side and a nearly entire smooth median 

 line; elytra two-fifths longer than wide, evidently more than twice 

 as long as the prothorax, oblong, subparallel, obtusely though 



