COLEOPTERA. 175 



angle ; punctures rather coarse, round, evenly distributed, very deeply 

 impressed, distant generally by less than one-half their own widths ; inter- 

 spaces feebly convex. Elytra at base about as wide as the head ; sides very 

 feebly divergent posteriorly, much longer than the width at base, feebly 

 arcuate, very slightly more strongly so toward the apices ; together broadly, 

 roundly, and rather feebly emarginate behind ; suture one-third longer than 

 the pronotum ; surface feebly impressed along the suture, much more broadly 

 and strongly so toward the base ; punctures large, round, very deeply 

 impressed, nearly evenly distributed, distant by nearly their own widths ; 

 interspaces feebly convex, scarcely visibly reticulated. Abdominal segments 

 decreasing uniformly and rather gradually in width, first as wide as the con- 

 tiguous elytra, cylindrical ; border rather strong on the first, nearly obsolete 

 on the remainder ; surface coarsely, closely, evenly, and very deeply punc- 

 tate ; punctures as large as those of the pronotum, but more distant ; trans- 

 verse carinae tricuspid, cusps becoming very obscure and indefinite beyond 

 the second segment. Legs short and slender, black, tarsi dark piceous- 

 brown ; first three joints of the posterior decreasing nearly uniformly and 

 rather gradually in length, first shorter than the last ; fourth joints very 

 strongly bilobed, third less strongly so ; all densely, and in part spoil gy- 

 pubescent beneath. 



Male. — Un k nown . 



Female. — Sixth ventral segment rather narrow, sides nearly straight, rather 

 rapidly convergent toward apex, the latter strongly angulate, sides about the 

 angle nearly straight. 



Length 4.2 mm. 



New Hampshire, 1. 



Easily distinguished from reconditus — a very common species about 

 Boston, Massachusetts — by its narrower form, smaller head, coarser 

 and more distant elytral punctuation, and more intensely black integu- 

 ments. 



The tarsal claw is seen from the figure to approach in general out- 

 line that of reconditus, but has the tip more acute and farther pro- 

 longed. 



The figures of the claws drawn on the plate are merely intended to 

 give the outline when viewed in prolongation of the axis of the last 

 tarsal joint, and are not drawn to any scale, so that the relative sizes 

 of the figures are not the same as those of the claws from which they 

 were taken. 



21. A. canadensis n. sp. — Form moderately robust. Pubescence rather 

 short and dense, semi-erect, evenly distributed, cinereous, rather coarse and 

 conspicuous. Head moderate in size, robust, twice as wide as long : labrum 

 large; interocular surface feebly convex, more than two and one-half times 

 as wide as the eye ; sulcations almost obsolete ; intermediate surface broadly 

 and feebly convex; punctures rather small, round, very deep, evenly dis- 

 tributed except in the sulcations, where they are more closely crowded, 



