486 CASEY 



Vestiture decumbent or strongly inclined and not bristling 7 



2 — The vestiture of the ridges having the form of stiff hairs 3 



The vestiture of the ridges formed of elongate scales 6 



3 — Eyes widely divided, more sunken, the upper part narrower, the 



lower composed of only three or four facets, the canthus evenly 



joining the supra-antennal prominence, without break 4 



Eyes more convex, wider, less sunken, only barely divided by the pos- 

 terior canthus, which becomes very fine anteriorly and subdiscon- 

 nected from the supra-antennal prominence, the lower lobe of five 

 facets and not so sunken 5 



4 — Body a little larger and stouter, dark brown, densely and roughly 



punctured and with narrow^ fulvous scales anteriorly ; head oblong- 

 elongate, rather abruptly constricted at base, the angles evident 

 though rounded, the sides from the eyes to the angles feebly con- 

 verging and but slightly arcuate ; prothorax much narrower and 

 shorter than the head, three-fourths as long as the latter, widest 

 near apical third, the sides rounded anteriorly, sinuato-converging 

 posteriorly, the apex and base truncate and densely fringed with 

 porrect fulvous squamules as usual, the surface convex, impressed 

 medially near the base ; elytra barely twice as long as wide, twice 

 as wide as the prothorax, arcuately narrowed at base and apex, a 

 little more gradually toward the latter, the sides parallel and feebly 

 arcuate, the bristles becoming yellow and squamiform behind, 

 darker and hair-like elsewhere ; intervals between the ridges flat, 

 coarsely, biseriately punctate, with a series of widely spaced setae 

 between the rows; abdomen sparsely punctate. Length 3.7 

 mm.; width 1.07 mm. California (Vallecito, — near Julian). 



costipennis Lee. 

 Body small, more slender, dark rufo-piceous in color, the anterior parts 

 rather sparsely squamose, more finely and sparsely and less roughly 

 punctured than in costipennis ; head rather large, elongate-oval, 

 more gradually narrowed though more or less strongly rounded 

 toward base, the sides scarcely visibly converging from the anten- 

 nal prominences to the basal arcuation ; prothorax relatively nar- 

 rower and more elongate than in costipenttis^ four-fifths as long 

 as the head and much narrower, much longer than wide, formed 

 nearly as in costipen7tis but relatively less narrowed toward base, 

 more narrowly impressed along the median line almost in basal 

 third ; elytra evenly oval, very elongate, distinctly more than twice 

 as long as wide, the bristles abruptly pale and squamiform near 

 the apex, the double series of coarse punctures separated by a 

 widely spaced series of inconspicuous setae, the costa; nearly as in 

 costipennis ; abdomen rather coarsely and sparsely but more dis- 

 tinctly punctured, the surface smoother. Length 3.2-3.5 mm.; 

 width 0.77-0.98 mm. Arizona (Tu9Son), — H. F. Wickham. 



tenuis n. sp. 



5 — Form slender, the smallest known species of the genus, dark rufo- 

 piceous, the punctures and scales of the anterior parts small and 



