BIEDS — COEVIDAE — PICICOEVUS COLUMBIANUS. 



573 



Comparative measurements of species. 



PICICORVUS COLUMBIANUS, Bon. 



Clarke's Crow. 



Conus columbianus, Wilson, Am. Orn. Ill, 1811, 29 ; pi. xx.— Bon. Obs. Wilson, 1824, No. 38.— Ib. Syn. 1828, 



57.— NoTTALL, I, 1832, 218. 

 JVuct/rago cofuniMano, Ann. Orn. Biog. IV, 1838, 459 ; pi. 3Gi2.— Ib. Syn. 1839, 15G.— Ib. Birds Amer. IV, 1842, 



127 ; pi. 235.— Eon List, 1838.— Nuttall, Man. I, 2d ed 251. 

 Picicorvus colnmhianus, Bonap. Consp. 1850,384. — Newberry, P. R. R. Rep. VI, iv, 1837, 83. 

 " Co:vus megonyx, Wagler." 



Sp. Ch.— 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 the nasal feathers, the forehead, sides of head, 

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

 tertials, except the innermost, broadly tipped with white ; tail white, the inner web of the fifth feather and the whole of the sLUh, 

 with the 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 sjiecies 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. 



List of specimens. 



Catal . 

 No. 



8472 

 8240 

 8539 

 8878 

 8870 

 8S71 

 8872 

 8874 

 8875 

 1929 

 6999 

 8473 

 8475 

 8474 

 4460 

 4461 

 8470 

 6471 



Sex. 



Locality. 



Wlieu col- 

 lected. 



Milk river, Up. Mo 



30 miles east of Ft. Kearney, 

 do 



Sept. 2,1853 

 Oct. 24,1857 

 do 



Black Hills, Keb Sept. 15.. 



do I do.. 



.... do I June 29, 



do Sept. 12. 



.do.. 



Raw Hide Peak, Neb.. 

 Uucky mountains..... 

 Medicine Bow, Neb . . . 

 Minibres to Rio Grande 

 75 miles west of Albuquerque Nov, 15,1853 



95 do ' Nov. 16,1853 



Cascade mountains, O.T 



do 



Sept. 14 



Sept. 6 



June 16,1334 

 July 26,1857 



Yakima river, W. T. 

 do 



Aug. 5, 1853 

 Sept. 1,1853 



Whence obtained, Orig'I 

 No. 



Gov. Stevens... 

 W. M. Magraw. 



do 



Lt, Warren.,.. 

 do 



222 

 221 



.do.. 



.do,, 

 .do.. 



.do.. 



S. F. Baird 



Lt. Bryan 334 



Dr. Henry 



Lt, Whipple 



do 



Lt, Williamson 



do 



Gov, Stevens....! 29 

 do I 10 



Collected by- 



Dr. Suckley. 

 Dr. Cooper . 



, do , 



Dr. Hayden. 



do 



do 



.do., 

 .do.. 

 ,do,. 



J. K, Tuvvnsend, 

 W, S, Wood,... 



Length. 



Stretch 

 ofwings. 



11,75 

 12.25 

 12.00 

 11.00 

 11.00 

 11.25 

 12,00 



12.50 



Eennerly & Mull. 

 do 



Dr, Newberry. 



do 



Dr. Cooper. ... 

 do 



21.50 

 22.00 

 ^.00 

 20.00 

 21,50 

 21.50 

 24,00 



21,50 



Wing, 



7.12 

 7.75 

 7.75 

 7.00 

 7.00 

 7.25 

 7.50 



7.13 



Bill and feet black. 

 do 



Iris brown . 

 Iris gray. .. 



