75. FALCo. 405 



Heuyl. Ibis, 1860, p. 408; Loche, Rcpl. Sci. Ahjit:, Ois. p. CO 

 (1807) ; Gurney, Ibis, 1867, p. 380, et 18U9, p. 445, pi. xvi. : Gran, 

 Iland-l. B. i. p. 21 (18o0) ; Saund. Ibis, 1871, p. 58. 



Dendrofalco eleonoric, lip. Rev. Crit. p. 131 (1850). 



Dendrofalco arcadicus, L. lirvhm, Kmim. 1855, p. 268. 



Falco plumbeus, L. Brehm, Naum. 1856, p. 236. - 



Falco dichrous, Erhard, Nativi. 1858, p. 25. 



Falco radama, Roch 4- Neiut. Ibis, 1862, p. 266 ; Maill. Reun. p. ICO 

 (1862). J >f > I 



Adult. Everywhere dark brown, iuclining to black, the quills 

 blackish ; tail brown, with pale rufous bars on the inner webs ; cere 

 yellowish blue, orbits yellow ; feet yellow, claws black ; bill black, 

 yellow at base of lower mandible ; iris dark brown. Total length 

 15-5 inches, culmen 1-1, wing 13-3, tail 7-5, tarsus 1-5. 



Young. Above brown, the hind neck varied with rufous ; forehead 

 and feathers over the eye whitish ; throat and sides of the face and 

 neck yellowish white, the cheek-stripe, as well as the feathers under 

 the eye and along the upper margin of ear-coverts, dark brown ; quills 

 dark brown, some of the secondaries notched with rufous buff; tail 

 banded alternately with pale rufous and black cross bars, almost ob- 

 solete on the two centre rectrices ; under surface of body rufous, 

 with median patches of brown on each feather, giving a somewhat 

 striped appearance, some of the feathers, especially the flanks and 

 thighs, washed with fulvous ; the under tail-coverts less spotted ; 

 under wing-coverts dark brown, spotted and banded with rufous 

 buff; cere pale greenish yellow; feet lemon-yellow; bill horn- 

 colour, lighter at base ; iris dark hazel-brown. Total length 13-5 

 inches, culmen 0-95, wing 11-8, tail 6, tarsus 1-35. 



Intermediate stages are often seen, when the young or " hobby " 

 plumage is being gradually obscured by the approaching sooty brown 

 dress of the adult. 



«, 6,e. J 2 ad. juv. St. Algeria. Purchased. 



d. Skeleton. Zoological Society. 



25. Falco coiicolor. 



Falco concolor, 7Vm»n. PI. Col. texte to pi. 330 (1825) ; Gmdd, B. 

 Eur. i. pi. 25 (1837) ; Schl. ti. Susem. Voq. Eur. Taf. 9. fio-. 1 

 (1839); Fritsch, Vog. Eur. tab. 3. fig. 3 (1858); Koniq-Wurth. 

 Ibis, 1860, p. 124 ; Ilartl. Bvitr. Orn. Madaq. p. 18 (1861) ; Buhois, 

 Ois. d'Eiir. p. 22, pi. 22 (1862); Schl. Mns. P.-B. Falc. p. 25 

 (1862) ; Degl. cS- Gerbe, Orn. Eur. 1. p. 88 (1867) ; Schl. c^- Poll. 

 Faun. Madar/., Ois.f. 31, pi. 12. fig. 1 (1868) ; Hiuql. Orn. N.O.- 

 Afr. i. p. 31 (1869) ; Gra,/, Hcind-l. B. i. p. 21 (1869) ; Finsch u. 

 Ilartl. Voff. Ostafr. p. 69, Taf. 1 (1870); Shelley, B. of Eqiipt, 

 p. 192 (1872) ; Schl. Revue Aceijntr. p. 40 (1873)." 



Hypotriorchis concolor, Grai/, Gen. B. i. p. 20 (1844) ; Bp. Consp. i. 

 p. 25 (1850) ; Horsf. ^- 3Ioore, Cat. B. 3Ius. E. I. Co. i. p. 23 

 (1854); Heiiffl. Ibis, 1860, p. 409 ; Gurney, Ibis, ISm, \x 445; 

 Gray, Iland-l. B. i. p. 21 (1869). 



Tinniinculiis conoolor, Riipp. Syst. T^ebcrs. p. 11 (1845). 



jEsalon tibialis, Kaup, Confr. Orn. 1850, p. 64. 



Dendrofalco concolor, Brehm, Naum. 1855, p. 268. 



