NORTH AMERICAN COLEOFTERA. 173 



club densely scaly. Head densely scaly. Prothorax about as wide a^loiig, not 

 strongly narrowed anteriorly, broadly but not deeply constricted behind the an- 

 terior margin, very feebly rounded on the sides, surface not very densely and 

 rather coarsely punctured, punctures entirely concealed by the scales, a narrow 

 median vitta, lateral margin and a line each side of disc whitish. Elytra two- 

 fifths and rather suddenly wider at the base than the prothorax, nearly twice as 

 long as wide, humeri prominent, rounded, sides straight and j)arallel for one-half 

 their length then broadly rounded to the apex, stria? fine, punctures distinct, 

 approximate, concealed by the scales, interstitial set* hair-like, brownish, not 

 evident; pale scales more predominant on the sides. Thighs moderately clavate, 

 tibise subparallel, widened at the tip, setulose within, apical hooks, especially the 

 posterior, small ; articulating surface of posterior tibia; obliquelj' ascending and 

 open externally; tarsi slender, fourth joint much longer than the third, which 

 is moderately bilobed ; claws moderate, slender and connate near the base only. 

 Length 2.25-2.75 mm. ; 0.09—0.11 inch. Plate vii, fig. 3c. 



Hab. — California (Mojave, S. Bernardino County), Arizona (Pinal 

 Mountains, Riverside), Wickham. 



Twelve specimens are before me. Varies considerably in appear- 

 ance according to the jireponderance of the dark or pale scales; 

 some specimens present an almost uniformly gray appearance with- 

 out a trace of thoracic vittte. S. silaceous Casey is not distinct from 

 the above ; the beak is distinctly longer and more slender in the 

 female than in the male, and the legs present all shades from rufous 

 to pitchy black. The great difference in measurements as given by 

 Casey and my own I cannot account for. 



S. liorilii n. sp. — Very similar in size and form to the preceding, scales dark 

 brown, mottlod with pale. Beak { % ) stout, moderately curved nearer the base, 

 densely scaly, basal tufts prominent, separated from the head by a deep incision ; 

 scrobes as in the preceding. Antennae stout, second joint a little longer than the 

 third, outer joints gradually wider, merging into the club, latter less densely 

 scaly. Prothorax as long as wide, gradually narrowed from the base, not evi- 

 dently constricted at the apex, very feebly rounded on the sides nearly to the 

 apex, apparently very densely punctured, punctures concealed by the scales, 

 latter dark brown, a whitish vitta on the basal half of the median line, continued 

 as a scutellar spot on the elytra. Elytra one-third and suddenly wider at the 

 base than the prothorax and nearly twice as long as wide, humeri prominent, 

 sides straight, subparallel for one-half their length, then broadly rounded to the 

 apex, striae fine, concealed by the scales, interstitial setae small, whitish, incon- 

 spicuous, a whitish scutellar spot, paler scales more conspicuous on the sides. 

 Legs rather robust, thighs not strongly clavate. tibiae stout, subparallel, apical 

 hooks small; tarsi stout, third joint not much wider than the second, fourth 

 joint not slender, projecting scarcely the length of the preceding; claws small, 

 connate beyond the middle. Length 2.75 mm. ; 0.11 inch. Plate viii, fig. 25. 



Hab. — Arizona. 



A single male specimen in my collection. Easily distinguished 



TRANS. AM. ENT. SOC. XXI. JUNE, 1894. 



