4 GEO. H. HORN, M. I). 



at the sides. Body beneath a little darker in color than above. 

 Legs brown, femora paler at base. 



In both sexes the carina on the elytra are well marked, rather 

 more elevated in the male. In well preserved specimens each punc- 

 ture bears a short hair and on the summits of the costje are slightly 

 longer hairs. 



Two male specimens in my cabinet have entirely pale legs. 



In his comments on this species (Proc. Acad. 1873, p. 24) Crotch 

 has clearly confounded two species. The male he describes belongs 

 to the next species. 



Occurs in Alaska, Idaho and Utah (Hubbard). Crotch says Van- 

 couver and Oregon also, but as he has confounded two species I 

 (juote only localities certainly known to me. 



S. simplex Lee 



Male. — Entirely ferruginous above and beneath. Thorax feebly 

 angulate at the sides, usually tridenticulate. Head and thorax 

 densely coarsely jjunctate, not .shining. Elytra with the four costse 

 moderately well developed. Posterior tibiae gradually dilated, the 

 apex prolonged on the inner edge beyond the insertion of the tarsus 

 and without spurs, a long curved process on the j)osterior edge near 

 the tip. 



Female. — Paler in color than the male. Thorax very feebly an- 

 gulate, and usually with three small denticles. Elytra quadricostate, 

 but less distinctly than the male. Posterior tibiie .sin)ple, and with 

 distinct terminal spurs. 



The male of this species may be very readily separated from any 

 other known form. By the pale antennte the females may be sepa- 

 rated from the preceding species. From ferruginea there is no very 

 obvious distinction, except that I observe in the present species the 

 terminal joint of the antenme is distinctly longer than the tenth, 

 while in ferruginea the two are about equal. 



Occurs in Alaska, Oregon, Washington and northern California. 



S. ferruginea Germ. 



Male. — Rufo-ferruginous, or rufo-testaceous. Thorax rather 

 broadly angulate at the sides and very obtusely tridenticulate. 

 Elytra quadricostate, the costae not well marked, excepting the sub- 

 humeral. Posterior tibiae slightly broader at tip and with terminal 

 spurs, the inner edge sinuate below the middle. 



i^emafe— Generally of a paler color than the male. Thorax 



