424 



ZOOLOGY— lilKDS. 



liiitcii boraills var. calurits, Bd., Bkkw., & Kidg., N. A. IJiids, iii, 1874, L'8G. — Yakkow 

 & IlENSiiAW, Ki'p. Orii. Specs., l.S'li, Wliocler'.s Exped., 1874, L'5. — IIen- 

 siiAW, Kt'p. Orn. Specs., 187.'i, AVbeeler's E.vptd., 1874, ttl, 140. — CoUEs, 

 Kiids North wf.st, 1874, ;553. 



PaTiloptcrniK boritilin, IlKNiiY, I'loc. Acad. Xat. Sci. Pliila., 1859, 105 (New IMi'.xico). . 



Butco montaitUK, ^KW'B., P. li. H. ]{op., vi, 1857,75. — Bd., P. K. K. lU'p., Bfckwitir.s 

 Koiite, X, 18.50, 12.— Xantus, Proc. Acad. Xat. Sci. Pliila., 1850, 100 (Fort 

 Tfjoii, Cal.).— llKERM., P. P. K. Pep., X, pt. ii, 1S.50, ;!2.— Kknnkklv, P. H. 

 11. Pep., Wliii)pk''.s Koutc, x, 1850, 10. — Bu., U. 8. & Mcx. Bound. Siirv., ii, i)t. 

 ii, 1850, Birds, ;{.— Cool'. & SrcKL., 1'. P. P. Pep., xii, pt. ii, 18(;o, 147.— 

 i'oiucs, Proc. Acad. Xat. Sci. Pbila., 1800, 4.'5. — COOPEK, Birds Cal., i, 1870, 

 400.— Stkv., U. S. Cieol. Stirv. Terr.. 1870, 402.— Snow, Birds Kau., 1872, 

 4.— Mkuuiaji, U. S. Geol. Surw Terr., 1872, 007. 



The licnl-tailed Hawk is an abundant resident tlu-ough the West, con- 

 iininj^f itself in summer to the mountains, and becoming more or less abun- 

 (hint in the lowhmds as winter approaches. The dark type of this l)ird 

 seems to be very mmierous in Arizona; individuals varying from the light 

 form known as montaniis to the dark fuliginous condition characterized 

 under the name rahtrns, the last condition being represented in perliaps one- 

 thi'"d of the number seen. The two forms occur together; and on one 

 occasion, at least, I noticed a pair of the birds, evidently mates, in wliich tlie 

 difference in coloration was striking, and visible at a long distance. At 

 Mount Graham, in October, these hawks were present in large numbers, 

 and tamer than I ever have known hawks to be elsewhere. Walking quietly 

 along, there was no difficulty in approaching within a few yards of the tree 

 where one chanced to perch. One individual which I scared from its perch 

 b}' throwing a stone, took a few broad circles about me, as though wonder- 

 ing Avhat it meant, and then quietly returned to his former stand. 



