BIRDS — CORVIDAE — PICICORVUS COLUMBIANUS. 



573 



Comparative measurements of species. 



PICICORVUS COLUMBIANUS, Bon. 



Clarke's Crow. 



Corvus eolumbianus, Wilson, Am. Orn. Ill, 1811, 29 ; pi. x.\.— Bon. Obs. Wilson, 1824, No. 38.— 1b. Syn. 1828, 



57.— NcTTALL, 1, 1832, 218. 

 .Vuci/'rflffaco/um5iano, Acn. Orn. Biog. IV, 1838, 459; pi. 362.— Ib. Syn. 1839, 15G.— Ib. Birds Amer. IV, 1842, 



127 ; pi. 235.— Bon List, 1838.— Nuttall, Man. I, 2d cd 251. 

 Picicorvus eolumbianus, Bonap. Consp. 1850,384. — Newberry, P. K. R. Hop. VI, iv, 1837, 83. 

 " Co'vu3 megonyx, Wagler." 



Sp. Cii. — Tail rounded or moderately graduated, the closed wings reaching nearly to its tip. Fourth quill longest ; secon 

 considerably shorter than the sixth. General color bluish ash, changing on tlio nasal feathers, the forehead, sides of head, 

 (especially around the eye,) and chin, to white. The wings, including their inner surface, greenish black, tlie secondaries and 

 tettials, except the innermost, broadly tipped with white ; tail wliite, the inner web of the fifth feather and the whole of the sixth, 

 with llie upper tail coverts, greenish black. The axillars plumbeous black. Bill and feet black. 



I ength of male, (fresh,) 12 inches ; wing, 7 ; tail, 4.30 ; tarsus, 1.20. 



Hab. — From Rocky mountains to Pacific. East to Fort Kearney. 



The tail of this species is nearly even, or but slightly rounded, the lateral feathers being 

 about .20 of an inch shorter than the other white ones. Sometimes, however, the middle black 

 feathers project beyond the rest for nearly half an inch. 



There is considerable variation in the size of this species, as well as a striking difference in the 

 length of the bill. Thus, in 4460, from the Cascade mountains, the bill is nearly two inches long, 

 slender and attenuated, exceeding by half an inch that of 8239. The length is 12.50 inches ; 

 wing, 7.50 ; tail, 4.65. The general color is sometimes quite pale bluish ash, becoming appre- 

 ciably lighter on the head. The female is quite similar. 



lAst of specimens. 



Calal. 

 No. 



6*72 

 8240 

 8i!39 

 8878 

 8870 

 8871 



88ra 



8874 

 8875 

 1!H9 

 69y<l 

 8473 

 8475 

 8474 

 4460 

 4461 

 8470 

 8471 



Sex. 



Locality. 



Wben col- 

 lected. 



Milk river. Up. Mo Sept. 2, 1853 



30 miles cast of Ft. Kearney. Oct. 24,1857 

 do do 



Black Hilto.Neb Sept. IS 



do ' do 



.... do June 29 



do. Sept. 12 



do ! Sept. 14 



Raw Hide Peak, Neb Sept. 6 



Rocky mountains June 16,1834 



Medicine Bow, Neb July 26,1857 



Mimbres to Rio Grande I 



75 mites west of Albuquerque Nov. 



95 do Nov. 



Cascade mountains, O.T 



do 



15, 1853 

 16,1853 



Takima river, W. T. 

 do 



Aug. 

 Sept. 



5,1853 

 1,1853 



Wlience obtained. Orig'l 

 No. 



Gov. Stevens... 

 W. M. Magraw. 



do 



Lt. Warren.... 

 do 



222 

 231 



.do.. 



.do.. 



.do.. 



do 



S. F. Baird. 

 Lt. Bryan... 

 Dr. Henry... 

 Lt. Whipple. 

 do 



Lt. Williamson.. 



, do 



Gov. Stevens... 

 do 



Collected by- 



Dr. SuckJey. 

 Dr. Cooper . 



do 



Dr. Haydtn. 



do 



do 



do 



Lcngtti. 



Stretch 

 of wings. 



.do.. 



.do.. 



J. K. Townsend. 

 W. S. Wood.... 



Kennerly & Mull 

 do 



Dr. Newberry. 

 do 



Dr. Cooper.... 

 do 



11.75 

 12.25 

 13.00 

 11.00 

 11.00 

 11.25 

 12.00 



21.50 

 22.00 

 22.00 

 20.00 

 21.50 

 21.50 

 24.00 



Wing. 



7.12 

 7.75 

 7.75 

 7.00 

 7.00 

 7.25 

 7.50 



7.12 



BUI and feet black. 

 do 



Iris brown. 

 Iris gray... 



