338 MEMOIRS ON THE COLEOPTERA 



scales near the eyes; clypeus with parallel and nearly straight sides, 

 transverse, medially slightly sinuate apex and blunt angles, clothed 

 with very slender squamules, sparse basally, dense apically ; antennal 

 club missing in the type; last palpal joint nearly three times as 

 long as wide, testaceous; prothorax a little more than twice as wide 

 as long, rather broadly and feebly lobed at base, the sides obtusely 

 angulate behind the middle, thence about equally converging to 

 apex and base; punctures coarse, close-set at some points, very sparse 

 at others, smaller and close near the sides, the sparse pale yellowish 

 vestiture varying from slender scales to longer suberect stiff hairs; 

 sublateral whitish vittse broad and dense in basal half, diffuse and 

 obsolescent in apical half, the median line rather narrow; scutellum 

 densely clothed throughout its surface, except at tip, with moderate 

 whitish scales; elytra a third longer than wide, a fourth wider than 

 the prothorax, oval, rounding behind the middle, rather strongly 

 but sparsely punctured and with very small sparse squamules, 

 which are nearly four times as long as wide and of exactly the same 

 color as the whitish dense scales of the suture and discal lines, the 

 latter somewhat ragged; lateral longitudinal impression long and 

 distinct; pygidium wider than long, arcuately triangular, convex, 

 shining, concolorous; abdomen with very sparse whitish scales, 

 dense at the segmental apices. Length 22.0 mm.; width 10.5 mm. 



Arizona. One specimen laevicauda n. sp. 



Pygidium very densely clothed throughout or in great part 20 



20 Pygidium closely clothed throughout with perfectly uniform white 

 appressed scales, fusiform and about twice as long as wide, without 

 trace of short intermingled minute hairs. Body rather narrow, elon- 

 gate and cylindric-oval, deep black almost throughout, the legs ferru- 

 ginous, with blackish femora, moderately shining; vertex with rather 

 small but deep punctures and clothed densely with very stout de- 

 pressed scales, twice as long as wide or less, sparser medially, dense 

 peripherally; clypeus rather short, deeply concave, pallescent apic- 

 ally, truncate at apex, the angles acute and laterally prominent, the 

 sides thence sinuously converging to the base; scales much longer and 

 more slender than those of the vertex, sparse, denser laterally and 

 apically, the erect hairs rather short, fine and inconspicuous; an- 

 tennae testaceous, the club twice as long as the stem; last palpal 

 joint more than three times as long as wide; prothorax barely twice 

 as wide as long, subtrapezoidal, the sides broadly rounded and sub- 

 prominent behind the middle, thence parallel to the base and moder- 

 ately converging apically, deep black, shining, with sparse and 

 moderate punctures bearing large scales, the three white vittae all 

 broad, dense and entire, none of the dorsal scales become in the least 

 hair-like and there is no trace of erect hairs, the broad scales mutually 

 subsimilar almost throughout, becoming narrow laterally, where 

 the reflexed margin is feebly, diaphanously paler; scutellum with a 

 large triangle of very dense small scales; elytra fully two-fifths longer 

 than wide, barely a fourth wider than the prothorax, rather more 

 rapidly rounding behind in apical third; punctures fine and sparse, 

 the scales of the intervals pale yellowish, sparse, fusiform and twice 



