578 



TJ. S. P. K. R. EXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT. 



List of specimens. 



PICA NUTTALLI, A u d . 



Yellow-billed Magpie 



Pkanuttalli, Acn. Cm. Biog. IV, 1838, 450; pi. ."SG-a Ib. Syn. 1839, 152.— Ib. Birds Amer. IV, 1842, 104 ; 



pi. 228.— Bon. List, 1838.— Ib. Conspectus, 1850, 383.— Nuttall, Man. I, 2ded. 1840,236.— 



Newberrt, Rep. P. R. R. VI, iv, 1857, 84. 

 Cleptes nultalli, Gambel, J. A. N. Sc. Pli . 2d Series, I, 1847, 46. 



Sp. Ch. — Bill, and naked skin behind the eye, bright yellow ; otherwise similar to P. kudsonica. Length, 17 ; wing, 8 ; 

 Uil, 10. 



Hab. — California. 



This species, in every ajipreciahle respect, is precisely similar to the coinmon magpie, with 

 the exception of the bill and naked skin around and behind the eye, which are bright yellow. 

 Soinefimee this is rendered darker from the fact that the transparency of the horny covering of 

 the bill allows the bone to be seen through it. The size is rather smaller, but this may be the 

 result of its more southern locality. It is a very serious question, whether the bird it; anything 

 more than a permanently yellow-billed variety of the common bird. It is well known that in 

 Psilorhinua morio, and other garruline birds, tlie bill may be either yellow or black, almost in 

 the same brood of young ; and if niagiiies witli these differences were habitually associated 

 throughout the continent, tjiere would probably be no hesitation in combining tiiem. The 

 restriction of the yellow billed magpie to the coast region of California, where it is unmixed 

 with black billed individuals, except in the northern portion of the State, is an interesting fact. 



