392 Coleopterological Notices, IV. 



overlap in a longitudinal direction, blackish-gray and whitish confusedly 

 intermingled, the latter more prevalent toward the sides ; scales of the under 

 surface smaller and nearly white, extremely dense; recurved setae sparse, 

 dark brown and inconspicuous. Head densely squamulose, the vestiture 

 decumbent ; transverse sulcus distinct ; beak in both sexes densely clothed 

 almost throughout with short sparse setae and large recumbent and close-set 

 scales, tufted and erect at base, in the male short, just visibly bent, stout, 

 scarcely longer than the head and prothorax, the antennae inserted at apical 

 two-fifths, in the female distinctly longer, evenly, distinctly arcuate, scarcely 

 more slender, a little more than one-half as long as the elytra, with the antennae 

 inserted just beyond the middle ; antennae moderate, the second funicular 

 joint nearly one-half longer than the third ; basal joint not quite as long as 

 the next three in the female, slightly shorter in the male. Prothorax very 

 small and narrow, nearly as long as wide, with subparallel and very feebly 

 arcuate sides, subapical constriction broad and feeble ; apex four-fifths as wide 

 as the base. Elytra at base very nearly twice as wide as the prothorax, a little 

 more than three times as long, two- thirds longer than wide ; sides straight 

 and parallel to the middle, then narrowly parabolic, the sides in apical third 

 strongly convergent and nearly straight ; striae fine, completely concealed by 

 the large scales. Length 1.7-2.2 mm. ; width 0.7-0.9 mm. 



California (Majave) ; Arizona (Riverside). Mr. H. F. Wickham. 



This species resembles seriatus, but is easily distinguishable by- 

 its still smaller subcylindrical prothorax, and very large imbricated 

 scales of the upper surface. It was taken in considerable abun- 

 dance and I have before me eight specimens. 



12 S. silaceus n. sp. — Narrowly oblong-oval, moderately convex, black, 

 the legs dull rufo-piceous, the tarsi blackish ; vestiture consisting of moder- 

 ately large, elongate-oval scales, extremely dense, widely overlapping, pale 

 ochreous in color, feebly variegated with a slightly darker brown, finer and 

 sparser in two wide approximate pronotal vittae, which are thereby darker in 

 tint ; on the under surface whitish, broadly rounded and dense ; recurved 

 setae stout but short and not very conspicuous. Bead squamulose, the con- 

 striction distinct ; beak in the male short, stout, dull, densely punctate, 

 squamulose except beyond the antennae, very feebly arcuate, subequal in 

 length to the head and prothorax, with the antennae inserted at apical third, 

 in the female slightly longer, more slender and arcuate, smooth, polished and 

 minutely, sparsely punctate in apical two-fifths, slightly longer than the head 

 and prothorax and just visibly more than one-half as long as the elytra, with 

 the antennae inserted at apical two-fifths ; basal fasciculate tufts rather dis- 

 tinct ; antennae short, the second funicular joint but slightly longer than the 

 third. Prothorax very nearly as long as wide, the sides broadly, evenly arcuate, 

 feebly convergent and very broadly, feebly sinuate near the apex. Elytra at 

 base one-third to two-fifths wider than the prothorax, nearly three times as 

 long, one-half longer than wide, the sides parallel and straight in basal half, 



