272 



NORTH AMERICAN HIRDS. 



Dr. Cooper found this bird protty coiunion in tlio viciiiity of San Dipr;n, in 

 March, 18(lli, when they were ai)])ar('ntly mi^'ratint,' northward. In (heir 

 haliits tliey ap))eared to re.senilde tlie hir^'cr varietie.s of r>uz/-ard.s. ^Ir. Salvin 

 ol)tained a siii^^le specimen of a Hawk at Duena.s, wldch i.s referred by Mr, 

 (Jiirney to tliis variety (Ilii.s, 1, 21(1), 



Tlie variety (ui/pfmis, of this specie.s, was first described fntni an imnia- 

 ture specimen obtained at Fort Filhnore, New Mexico. It ranges southward 

 throughout tropical America to IJuunos Ayrcs. 



Buteo zonocercus, Sclatku. 



BAND-TAIL HAWK. 



n Buiro alhmotiitHs, O. K. Ok.w, I.si.s, 1847, p. aay. Btilcn zonocercus, Sclateii, Tran,s. 

 Zoiil. Soo. 1,011(1. IV, jit. vi, -itiS, 1858.— CorKs, I'r. A. N. S. 1866, 46. — Ei.mot, Diiils 

 X. A. 111. .\x.\iii. -Cii.VY, Hiiml List I, 8, 186i». — CooPKli, liiidsCal. 1870, 479. 



Sp. Vwsw. Adnll (3().S72, Hnssnynmpa River, Arizona Territory, August; Dr. Coues). 

 Entiicly carlioiiiiccou.s liliu.'k ; I'oi'cln'ail pure white, anil foatliers of occiput, noek, ami lirca.st 

 tin; same beneatli the surface ; tills on under parts, .^liowing as transverse, ovate spots on 



Blittn zo)wcfrcits. 



web.'* of feathers partially exjioscil. Tail bliiek, faintly tipped witli pale a.'^liy, ero.«sefl 

 (al)out IJ iiiclics from llie end) liy a band of lioary jilimibeous, nearly an inch in widtli; 

 aliout lialf an inch anterior to tliis is anotlier [ilumbeous band, about as broad a.s tlic black 

 one wliicii scjiaratOs it t'roiii thela.^t ; and almut the same distance, near the base, is anotlier, 

 much narrower, and le.-^.s continuous ashy liand. The outlines of these bands arc rather 

 irre<rular ; and on the inner welis the iilinnbcou.s is replaced by snowy Avhite, which, not 

 exactly correspondiiifT to the plumbeous of outer webs, is r.ithcr more extended, as well 

 .IS more shiirply defined, forminu' three very conspicuous transver.se zones (decreasing in 

 width towards the base like tlio.<e on outer W(,'b.s), ob.scrvalile only when the tail i prcail, 

 or ti'oni below. On the two iniddlc leathers both webs arc plumbeous anil lilack ; and 

 on the lateral feathers, the white ])revails on the inner web, the black bands being broken 

 u\) into narrow zigzag.s. Primaries Ic'ss intensely black than tlu' back, and .showing ob- 

 scui-c transverse bands of deeper black; lining of the wing unvariegated black; under 

 surface of primaries pale plumlieous, passing into hoary white on edges, and cros.sed from 

 base to ends with very irregular, transverse bars of blacki.sh, thc,«e breaking up into a 

 mottling, or blended speckling, along the edges of the leathers. Owing to moulting stage, 



