168 GEO. H. HORN, M. D. 



of the tarsal joints of the male. The anterior claws of the front and 

 middle tarsi of Jlt/potrichia have a broad tooth, free, except at base. 

 The anterior claw of the posterior tarsi has a slight dilatation at base. 



The tribes of Scarabaeidse, in the vicinity of the Sericoidini, have 

 need of a thorough revision. The position of the last spiracle, whether 

 in or out of the line of the suture between the penultimate dorsal and 

 ventral segments, appears to be a eliaracter of some value, as also the 

 presence of a groove leading backwards from the spiracle toward the 

 last dorsal suture. 



The genus is placed provisionally with Hi/potrichia among the Seri- 

 coidini, with the hope that renewed observations on larger series of ge- 

 nera may afford a better clue to its true relationships, 



COTALPA, Burin. 

 For a long time the only known species of this genus was ranked 

 among the AreodjB, Kirby being the first to indicate generic differ- 

 ences. The typical species appear to have an extensive range, being 

 found over nearly the whole region eastward of a line drawn midway 

 between the Rocky 3Iouutains and the Mississippi River. In 1852 

 Prof. Haldeman described a second species from Utah; lately Dr. Le- 

 conte has made known a third, from a point still farther westward, 

 New Mexico, and while in San Francisco, during the first few days of 

 my stay there, I was surprised at receiving a fourth species from the 

 Southern Coast Range. Subsequently other specimens were collected 

 near the base of the South-eastern Sierras, again in Owen's Valley, 

 and finally along the mountainous region between Temescal and the 

 Lajruna grande, on the road towards Fort Yuma. 



C. ursina, bluish-black; head and thorax coarsely and densely punctured ; 

 thorax convex, sides strongly rounded, narrower anteriorly, base broadly lobed, 

 elytra broadly oval, brownish testaceous, coarsely punctured. Beneath bluish- 

 black, tibisB paler. Length .95, % ; .62, 9 , inch. 



The clypeus is parabolic, slightly margined in front. The head and 

 thorax are rather densely clothed with suberect yellowish hairs, the 

 hairs of the elytra are much shorter, recumbent and more sparsely 

 placed. Reneath the body is also densely clothed with long hairs, 

 particularly on the sides of the metasternum. The elytra vary some- 

 what in color, among the specimens from different localities. Those 

 from the maritime slope of California are brownish testaceous, those 

 from the mountain regions of the south-eastern portion of the State 

 are much lighter in color, while a unique from Owen's Valley is orange- 

 red. The first and last regions furnished specimens with much more 



