136 WILLIAM G. DIKTZ, M.D. 



long and slender, and in most of the species not longer than the 

 third. Prosternum either deeply or more broadly emarginate, gen- 

 erally transversely impressed, never sulcate, and without antecoxal 

 ridges. The fourth tarsal joint is slender and projects fully the 

 length of the third joint; claws approximate, very small and con- 

 nate one-half or more their length {mucidas has the claws rather 

 moderate and slightly divergent). 



The species are to be distinguished as follows : 



Larger species, 3.0 mm. or more, postocular lobes well developed, prominent. 

 Tibial spurs prominent, conspicuous, robust species. Plate vii, fig. 9. 



Pitchy brown, prothorax not deeply constricted at the apex, third tarsal 



joint broadly bilobed profiisusii. 



Dirty gray, hirsute, prothorax deeply constricted behind the anterior margin. 



third tarsal joint scarcely bilobed iiitricsitiis. 



Tibial spurs small, inconspicuous, species more elongate, parallel on the sides. 

 Scales gray, or yellowish gray, unicolorous, elytra declivous at the base. 



mucidiis. 

 Elytra with a broad lateral vitta or stripe. 



Prothorax rounded on the sides, vitta fulvous. Plate vii, fig. 12. 



perple.xiis. 

 Prothorax straight on the sides behind the middle, vitta predominantly 



whitish tardus. 



Smaller species, 2.75 mm. or less, postocular lobes obsolete, or very feeble, tibial 

 hooks prominent 

 Not very densely scaly, scales not crowded or overlapping above, oval or elon- 

 gate, prothorax narrowed toward the base. 



Larger, legs dark piceous, beak feebly curved picipes. 



Very small, legs reddish, 



Prothorax shining, neither deeply nor closely punctured, strongly rounded 



on the sides rliodopiis. 



Prothorax without lustre, densely punctured, broadly rounded on the 



sides piisilllis. 



Very densely clothed with large, broadly oval, imbricate scales, prothorax not 

 evidently narrowed posteriorly. 

 Larger, 2.75 mm., beak nearly straight, scales with pearly reflection. 



resplendent. 

 Smaller, 1.75 mm., beak curved, scales entirely without lustre piisio. 



S. profilSUS Cas. — Oblong-oval, pitchy black, densely scaly, scales broadly 

 oval, moderately large, pitchy brown, indistinctly mottled with paler scales 

 above, underside and legs paler. Beak feebly curved, slightly tapering from the 

 base, rather slender, about as long as head and prothorax in the male, a little 

 longer in the female, densely punctured and scaly from base to beyond the mid- 

 dle (% ), or less densely punctured and more shining towards the apex ( 9 ); 

 basal tufts and constriction well marked. Head finely rugulose, front punctured 

 and scaly. Antennne slender, second joint of funicle not slender, about one-half 

 longer than the third, basal joint of club subglabrous. Prothorax wider than 

 long, about one-half as wide at the apex than at the base, latter feebly bisiuuate. 



