CORVID.E — THE CROWS. 



265 



A specimen of P. nuttalli lias the lateral tarsal plates with two or three 



Pica hxidsonica. 



transverse divisions on the lower third. This has not been observed by us 

 to occur in P. hudsonica. 



Species and Varieties. 



P. caudata. Head, nerk, hroast, intor.<capuliirs, lininjx of wirier, tail-cover*:s 

 and til)iae, deep black : wings metallic frroenish-bhie ; tail rich metallic green, the 

 feathers passing through bronze and reddish-violet into violet-blue, at their tips. 

 Scapulars. aV»doiiien, sides, flanks, and inner webs of primaries, pure white. 

 Sexes alike ; young similar. 



(/. Bill and bare space around the eye black. 



Wing, 7.50; tail, 9.50 or less, its graduation loss than half its length, 

 4.50; culmen, 1.20; tarsus, 1.75; middle tcf^, 1.05. Hob. Europe. 



var. cnudd fa ' 

 Wing, over S.dO (8.50 maximum); tail over 10.00 (13.50, max., its 

 graduation more than half its length, 7.70); culmen, 1.55; tarsus, 1.75; 

 middle toe, 1.05. Hub. Northern and Middle North America, exclu- 

 sive of the Atlantic Province ol' United States and California. 



var. hud son ica. 

 b. Bill and bare space around the eye yellow. 



Wing, 7.50; tail, 10.50; its graduation, .5.00; culmen, 1.50; tarsus, 



1.75; middle toe, 1.05. Hub. California .... vai*. nuttalli. 



1 Pica caudat<i, Fi.f.m. Brit. An. j). 87. Cormm pica, LiNX, Fuan. Succ. p. 31. Pica m-hi- 

 iioleuar, ViEiLL. N. I). XXVI, 121. Pica albiirnfris, Yieill. Fami. Franc, p. 111>, t. 55, f. 1. 

 Pica curopcmi (Crv.^ B<uk, Isis, 1822, 551. Piai riisticorum, Leach, Syst. Cat. Manmi. and 

 Birds in Brit. Mus. p. 18. 



VOL. II. 



34 



