32 



U. S. p. R. R. EXP. AND SURVEYS ZOOLOGY GKNEKAL REPORT. 



List of specimens. 



I 



ARCHIBUTEO, Brehm. 



JrcAi6uleo, Brefcm, 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 Butto. 



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. 



ARCHIBUTEO LAGOPUS, Gmelin. 



Rongh-Iegged Hawk. 



faJco lagofus, GM..Syst. Nat. I, p. 260, (1788 ) 

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

 Falco pennalw, Cutier, Reg. An. I, p. 323,( 817.) 

 .^rchibuteo alticeps, Brehm, Vog Deutsch. I, . 40. 

 .irchib-uteo 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.) Reichenbacb, 



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. 



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



scapular, and shorter quills 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 quills, and wing covferts 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 ; tibiae and tarsi baired 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 alternatinif with others of light cinereous. Cere and toes yellow. Under wing coverts whilo^ 

 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 largo basal portion of their inner webs white ; 

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

 tudinal stripes and spots of dark brown. 



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



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



Hab.—M\ of temperate North America and Europe. Spec, in Mus. Acad., Philadelphia, and Nat. Mut Washington. 



