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 denselv 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 vellow 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 costipefznis ; 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 costipennis^ four-fifths as long 

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

 nearly as in costipennis but relatively less narrowed toward base, 

 more narrowl}' 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 setie, the costae nearly as in 

 cosiipen?iis ; 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), — II. 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 



