220 CALIFORNIA ACADEMY OF SCIENCES. [64] 



All the species of this genus which I have examined have 

 the bases of the first three or four dorsal segments of the 

 abdomen transversely impressed and densely and coarsely 

 punctate. In the Orus group the impressions are simply 

 finely reticulated or alutaceous and are entirely devoid of 

 punctures. 



S. brunnipes Lee. — (Tr. Am. Ent. Soc. VIII, p. 179). — 

 This form is described as having "pale brown legs." I have 

 thus far seen no such species in California, the legs of all 

 the Californian species here described being very dark. 



SCOP^IODERA n. g3Q. 



The species composing this genus have a distinctly Stili- 

 cioid outline and do not resemble Scopseus in outward form. 

 In addition to the characters given before, we may mention 

 the much longer legs and longer and more slender tarsi. 

 Besides nitidus Lee. this genus will perhaps comprise several 

 allied species described from South America by Dr. Sharp, 

 and also those Central American species placed by this au- 

 thor in Scopasus under group 4, together with the Colom- 

 bian 8 . pulchellns Erichs. 



LEPTORUS n. gen. 



The species assignable to this genus have a peculiar ap- 

 pearance and differ considerably from Scopgeus. They are 

 elongate, very slender, parallel, with oblong prothorax hav- 

 ing the anterior angles more or less prominent, and the 

 sides parallel or slightly convergent behind and nearly 

 straight. 



The genus is widely extended in its distribution through- 

 out the eastern portion of the United States, extending 

 through Mexico to Central America where it is represented 

 bjjilum, concolor, Salvini, obscurus, piceolus , brevipennis, and 

 umbra, recently described by Dr. Sharp in the Biologia 

 Centrali-Americana. It will also include exiguus Er. and 



