14 Tiios. L. caset:. 



In ceneopiceus the second joint is much longer than the third; third 

 and fourth equal ; fourth and fifth together much longer than the 

 second and third together ; fifth scarcely more than two-thirds as 

 long as the first. 



In pedicidarius the second, third, and fourth joints decrease in 

 length with great uniformity; the fourth and fifth together are very 

 much longer than the second and third. 



In ffaf/atiuus tlie first joint is not as long as the next three together; 

 the second, third, and fourth joints decrease very uniformly and 

 rapidly in length ; the second and third together are slightly longer 

 tlian the fourth and fifth together ; the fifth is equal in length to the 

 second, and is but slightly more than one-half as long as the first ; 

 the entire tarsus is much more slender. 



These differences are very striking, and are so great that it is 

 difficult to conceive of their not having been employed in the classi- 

 fication of the species in this genus. 



It may be well to remark, while considering this genus, that 

 (-S".) ellipticus Dej. is quite distinct from the {S.) granarius of that 

 author. 



STE^OLOPHUS. 



S. gracilis u. sp. — Form as in ochropezus. Body pale piceous-brown 

 above, somewhat paler beneath. Head across the eyes just perceptibly 

 narrower than the length including mandibles ; the latter very prominent ; 

 antennae slender, nearly as long as the elytra, first two joints piceo-testace- 

 ous, remainder dark piceous-brown. Prothorax small, slightly wider than 

 head and rather broader than long, very feebly atid evenly emargiuate 

 anteriorly ; sides strongly arcuate, rather more strongly so anteriorly ; 

 posterior angles rounded ; lateral border distinct ; surface highly polished, 

 confusedly punctate near the basal angles ; median line nearly obsolete. 

 Elytra at base one-third as wide again as prothorax, twice as long as broad 

 at base, evenly rounded behind ; sides parallel and distinctly arcuate ; sur- 

 face moderately convex, striae deep and well marked, close, interspaces very 

 convex and highly polished. Legs moderate, pale flavo-testaceous. Length 

 <i.O mm. 



Arizona ; one specimen. 



This species resembles ochropezus in its general form, but differs in 

 many other characters, among which may be cited the color of the 

 under surface, which in ochropezus is very dark, in some specimens 

 nearly bhick, while in the present species this color is paler than 

 the upper surface, which is in turn very much paler than that of 

 ochropezus : the spine of the front tibia projects from the middle point 

 of that member, while in the latter it is situated mucl) nearer the 



