54 MEMOIRS ON THE COLEOPTERA 



rower than the deep sulci, the bottoms of which are crossed by regular 

 transverse lines; pygidium evenly convex, not gradually more tumid 

 apically, shining, having very short sparse stiff hairs, the transverse 

 lines moderately close, nearly straight, shorter, coarser and deeper 

 than in the preceding and not interlacing; tooth of the anterior tibiae 

 short and broadly obtuse. Length (9) 10.7 mm.; width 5.1 mm. 



Southern Arizona. A single example subrutilans n. sp. 



8 Elytral ridges of equal elevation throughout the width as in the 



preceding section 9 



Elytral ridges unequal in prominence, 'the fourth and eighth evidently 

 more elevated; body narrow and elongate-oval, frequently of rather 



small size 1 1 



9 Fourth ridge from the suture about twice as wide as any of the others; 

 body very stout, black, shining, the abdomen piceous; hind femora 

 pallid and opalescent on the upper side; pronotum with metallic 

 lustre, the head and scutellum without such lustre, the elytra dark 

 brownish-flavate, a few of the lateral ridges darker, the pygidium 

 rufescent basally; head fully half as wide as the prothorax, coarsely, 

 very densely punctato-rugose and dull, the clypeus large, trapezoidal, 

 with broadly rounded angles, the edges broadly but very moder- 

 ately reflexed; antennal club a little shorter than the preceding five 

 joints; occiput at base greenish in lustre; prothorax large, trapezoidal, 

 one-half wider than long, the sides nearly straight, feebly subpromi- 

 nent near apical third, the prominent apical angles slightly blunt at 

 apex, the basal rounded; surface very shining, strongly punctate, 

 coarsely and rather closely toward the sides, sparsely and more feebly 

 medially, the sulcus narrow and barely traceable in about apical 

 half, the lateral fossae obsolete or barely traceable; pubescence coarse, 

 ;sparse and erect; basal bead almost obsolete at the middle; scutellum 

 densely punctato-rugulose and dull, shining and smooth at the edges; 

 elytra barely a third wider than the prothorax, a fourth longer than 

 wide, feebly cuneiform, with broadly rounded sides, the lateral 

 -edge much thickened basally in a vertical sense only; fourth costa 

 coarsely and confusedly punctate, except basally; pygidium feebly 

 convex, tumid medially near the apex, the fine interlacing lines 

 widely separated anteriorly, close apically, the erect hairs rather 

 numerous and not very coarse; tooth of the anterior tibiae strong 

 and triangular; hind tibiae equal in length to the femora. Length 



(9) 12.3 mm.; width 6.4 mm. Kansas obesula n. sp. 



A Somewhat similar to the preceding and with black under surface, 

 but with the legs and pygidium very pale in color throughout, the 

 hind femora infumate on the lower edge; head nearly similar but 

 smaller, black, the clypeus with less broadly rounded angles, the 

 suture similarly distinct; prothorax pale, with a large blackish 

 discal area distant from the base, otherwise nearly similar and 

 with obsolete impressions, the basal bead distinct medially and the 

 sides at apical third much more prominent; scutellum nearly 

 similar, less transverse, not quite so densely scabrous; elytra 

 wholly very pale in color, but little longer than wide, more narrowed 

 posteriorly and with the wide fourth costa very smooth and 



