174 NORTH AMERICAN 



shining, grayish-black. Elytra at base as wide as or just perceptibly wider 

 than the bead ; sides nearly parallel, longer than the width at base, feebly 

 arcuate, slightly more strongly so posteriorly ; together broadly, roundly, 

 and somewhat feebly emarginate behind : suture one-third longer than the 

 pronotum ; surface very feebly impressed on the suture toward the base ; 

 punctures much larger than those of pronotum, deeply impressed, somewhat 

 polygonal or rounded, nearly evenly distributed, usually distant by one-half 

 their widths ; interspaces moderately convex, finely reticulated, shining, 

 grayish-black. Abdominal segments decreasing uniformly and moderately in 

 width, first slightly narrower than the contiguous elytra, nearly cylindrical, 

 feebly constricted at base ; border obsolete, except on the first segment, where 

 it is distinct ; surface very closely, deeply, and evenly punctulate ; punctures 

 as large as those of the pronotum. Legs moderate, black, tarsi paler ; joints 

 two to four strongly bilobed, spongy beneath. 



Male. — Sixth ventral segment broadly and strongly sinuate at tip, sinus 

 occupying the entire apex, in the form of a triangular incisure, with the 

 angle broadly rounded, about twice. as wide as deep ; seventh broadly 

 rounded at tip, lateral setae strong. 



Female. — Sixth segment acutely rounded at the middle of the apex, lateral 

 portions of apex feebly sinuate. Abdominal segments much more robust. 



Length 3.9-4.6 mm. 



Cambridge, Massachusetts, 69; Lake Superior, 2; Iowa, 1. 



This species differs from tarsalis Ljungh in the eraargination ot 

 the elytra behind, which is very much stronger in the European 

 species. They also differ in the structure of the tarsal claws, as may 

 be seen from the plate. 



20. A. propiliqims n. sp. — Form rather slender. Pubescence short, 

 evenly distributed, somewhat sparse, cinereous, not conspicuous ; surfaces 

 polished, deep black. Head rather small, slightly more than twice as wide 

 as long; interocular surface feebly convex, three times as wide as the eye ; 

 sulcations very feeble, short, almost obsolete ; intermediate surface much 

 wider than the lateral portions, broadly and evenly convex ; punctures 

 coarse, round, evenly distributed, very deep, distant by slightly more than 

 one-half their own widths ; ocular lines meeting at more than two lengths 

 in advance ; antennae short and robust, scarcely as long as the width of 

 head, basal joint black, remainder brownish-testaceous, club not prominent, 

 scarcely darker ; third joint three-fourths longer than the fourth, fourth and 

 fifth equal in length, seventh longer than the eighth, almost equally robust, 

 tenth much the most robust, terminal joint much smaller and slightly 

 shorter than the tenth ; maxillary palpi very short and robust, very dark 

 piceous, slightly paler at the base, third joint strongly flattened. Prothorax 

 arcuately and very gradually increasing in width for two-thirds the length 

 posteriorly, where it is much narrower than long, and three-fourths as wide 

 as the elytra at base ; sides thence rather more rapidly convergent posteriorly 

 and distinctly sinuate ; anterior margin slightly longer than the posterior, 

 equally and very feebly arcuate ; surface feebly tuberculate near each basal 



