32 



U. S. p. R. R, EXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT. 



List of specimens. 



ARCHIBUTEO, Brehm. 



Archibuteo, Brehm, Isis, 1828, p. 1269. 



Tarsi densely feathered to the toes, but more or less naked behind and then covered with scales. Wings long and wide ; toes 

 short ; claws moderate ; tail rather short, wide. Other characters very similar to those of Buteo. 



This genus contains six or seven species, inhabiting Europe, Asia, and North America, all 

 birds of heavy, though robust, organization, subsisting mainly on small quadrupeds and 

 reptiles. The species of this genus are easily recognized by their having the tarsi feathered. 



AKCHIBUTEO LAGOPUS, G m e 1 i n . 



Rough-legged Hawk. 



Falco lagopus, Gm. Syst. Nat. I, p. 260, (1788 ) 

 Falco plumipes, Daudin, Traite d'Orn. II, p. 163. 

 Falco pennalus, Cuvier, Reg. An. I, p. 323,( 817.) 

 .SrchHuteo alticeps, Brehm, Vng Deutsch. I, . 40. 

 .Srchibuteo planiceps, Brehm, Vog. Deutsch. I, p. 40. 



Figures. — Naumann, Vog. Deutsch. I, pi. 34, (adult and young.) Brehm, Vog. Deutsch. pi. IV, fig. 2, (adult.) Reichenbach, 

 Deutschland's Fauna, Birds, pi. XIII, fig. 51, (adult.) Korner, Skandinaviska Foglar, pi. V, fig. 15, (adult.) Gould, B. of Eur. 

 I, pi. 15, (young.) Selby 111. pi. VII, (young.) Wilson, Am. Orn. IV, pi. XXXIII, fig. 1, (young.) Aud. B. of Am. pi. 422, 

 fig. 2, (adult.') 



Tarsus densely feathered in front to the toes, naked behind ; wing long ; tail rather short. 



Mult. Head above yellowish white, with longitudinal stripes of brown tinged with reddish, especially on the occiput. Back, 



scapular, and shorter quilla pale cinereous, with partially concealed transverse bands of white and dark brown, the latter 

 frequently predominating and giving the color on the back ; rump dark umber brown ; longer quilla, and wing covierts umber 

 brown ; primaries edged externally with ashy, and with a large space on their inner webs at their base, white, with a silky lustre. 

 Under parts white ; throat with longitudinal stripes of dark brown ; breast with large spots and concealed stripes of reddish 

 brown ; abdomen, with numerous transverse narrow bands of brownish black, most conspicuous on the flanks and tinged with 

 ashy ; tibise and tarsi barred transversely with white and dark brown, and tinged with reddish ; under tail coverts white. 

 Upper tail coverts white at base and tipped with brownish black ; tail white at base, with a wide subterminal band of black and 

 about two other bands of black alternating with others of light cinereous. Cere and toes yellow. Under wing coverts white 

 with spots of brownish black, and on the longer coverts with a large space of ashy brown. 



Young. Upper parts light umber brown, many feathers, especially on the head and neck behind, edged with yellowish white 



and pale reddish. A wide transverse band or belt on the abdomen brownish black ; other under parts yellowish white, with a 

 few longitudinal lines and spots of brownish black. Quills ashy brown, with a large basal portion of their inner webs white ; 

 tail at its base white, with a subterminal band of light umber brown, tip white ; tibise and tarsi pale reddish yellow, with longi- 

 tudinal stripes and spots of dark brown. 



Total length, female, 21 to 23 inches; wing, 16. to 17 inches; tail, 9 inches. Male, total length, 19 to 21 inches ; wing, 15 

 to 16 inches ; tail, 8 to 8| inches. 



jjab. All of temperate North America and Europe, Spec, in Mus. Acad., Philadelphia, and Nat. Mus Wiiahington. 



