326 MEMOIRS ON THE COLEOPTERA 



extremely clavate femora red in basal half or less; head rather large, 

 though narrower than the prothorax, strongly, transversely grooved 

 behind the antennal prominences, the antennae (d 71 ) dusky-testaceous, 

 black at base, the outer joints black distally, barely twice as long 

 as the body; prothorax not quite twice as wide as long, much nar- 

 rower than the elytra, the very oblique spicules near basal fourth; 

 punctures not coarse but very deep, rather close, the rounded black 

 spots moderate; surface even and with an impunctate flat line 

 basally; elytra three-fifths longer than wide, the sides very feebly 

 converging from the rounded and broadly exposed humeri, rounding 

 and converging in apical third, the angle dentiform, moderately 

 acute; line of flexure acutely defined but not cariniform; punctures 

 moderate, somewhat close-set, very close and deep on the flanks, 

 the outer of the elevated lines alone visible and only medially, 

 spots rather large, sparse, the posterior spot discal, transversely 

 oval; fifth ventral (c?) not distinctly longer than the fourth, broadly 

 truncate, the truncature distinctly sinuate medially. Length (cf) 

 5.8 mm.; width 2.2 mm. Indiana robustula n. sp. 



Front more or less densely granulose and rugosely punctate, in a manner 

 very different from the preceding or in lentiginosa 8 



8 Form narrower and more parallel, the prothorax but very little 

 narrower than the elytra. Blackish, the flanks barely at all less 

 so, the legs dull black, the femora pale basally; vestiture close, 

 whitish-cinereous, the denser lines of the elytra distinct except 

 basally but not elevated; head well developed, feebly transversely 

 indented; antennae (cf) twice as long as the body, rufous, black at 

 the articular apices, the scape black; prothorax not quite twice as 

 wide as long, the spicules short, at basal fifth; sides broadly angulate 

 at the middle, thence rather strongly oblique to the apex; surface 

 finely, rather sparsely punctate, with a large feeble rounded tumor 

 at each side of the median line before the middle, the interspaces 

 finely, transversely strigilate, the spots rather small; elytra not quite 

 twice as long as wide, of the usual outline, the apical angle dentiform, 

 moderately acute, the line of flexure strongly cariniform; punctures 

 small, rather sparse, well separated even on the flanks, the spots 

 moderate, sparse, posterior attaining the carina in the type; femora 

 moderately clavate. Length (c? 1 ) 4.8 mm.; width 1.65 mm. Iowa 

 (Keokuk) amnicola n. sp. 



Form moderately stout, less parallel, the prothorax always notably 

 narrower than the elytra 9 



9 Median line of the pronotum carinate from before the middle to 

 basal fourth. Body smaller than in any other species and less stout, 

 with smaller head, the front very densely, granularly rugose through- 

 out and dull; color piceo-rufous, the vestiture cinereous, minute, 

 not dense; antennae pale rufous, the articular apices black, the 

 scape piceous; prothorax short, very nearly twice as wide as long, the 

 spicule near basal fourth; surface bitumorose somewhat as in the 

 preceding, finely but strongly, not densely punctate, broadly concave 

 basally throughout the width; elytra three-fourths longer than wide, 

 of the usual form, the punctures fine, rather sparse, coarse and close 



