264 FALCONID-E. 



d. Juv. St. Coban, Guatemala. Capt. Kellett and Lieut. 



Wood [P.]. 



e. Ad. sk. Bahia. Dr. Wucherer [C.]. 

 /. Skeleton. Zoologieal Society. 



2. Spizaetus tyrauuus. 



Falco tyrannus, 3Iax. Reis. Bras. i. p. 360 (1820) ; Temm. PI. Col. 



i. pi. 73 (1823). 

 Harpyia bracchata, Spix, Av. Bras. i. pi. 3 (1824). 

 Aquila tjTannus, Less. Man. (TOrn. i. p. 84 (1828). 

 Astur tyrannus, Less. Man. (TCh-n. i. p. 92 (1828). 

 Morphnus tyrannus, Cuv. Begyie An. i. p. 3-31 (1829). 

 Ptemura tj'rannus, Kaup, Mits. Se^ichenb. iii. p. 259 (1845). 

 Spizaetus tyrannus. Gray, Gen. B. i. p. 14 (1845) ; BjJ. Consp. i. 



p. 29 (1850); Stnckl. Orn. Si/n. p. 69 (1855) ; Burm. Th. Bras. ii. 



p. 62 (1856) ; Gray, Hand-l. B. i. p. 12 (1869) ; Peh. Orn. Bras. 



pp. 4, 397 (1871) ; Scl. (|- Salv. Nomencl. p. 120 (1873) ; Schl. Revue 



Acdpitr. p. 59 (1873). 

 Spizaetus bracchatus, Des Murs, R. Z. 1847, p. 323 ; Lafr. R. Z. 1848, 



p. 134 ; Strickl. Orn. Sijn. p. 68 (1855) ; Leot. Ois. Trinid. p. 12 



(1866). 

 Spizaetus spixii, Des Murs, R. Z. 1847, p. 325. 



Adult. Black above and below, the ■wing-coverts a little browner, 

 the leg-feathers, as well as the under wing- and tail-coverts, slightly 

 varied with a few bars or spots of white, more distinctly inclining to 

 bars on the latter ; quills deep brown, externally shaded with ashy 

 grey, and broadly banded with black ; the lower surface of the wing 

 blackish brown, with three irregular bands of ashy white ; upper 

 tail-coverts black, with a narrow tip and a few indistinct spots of 

 white ; tail black, crossed with four bands of ashy brown, the basal 

 one very narrow and indistinct. Total length 29 inches, culmen 1*9, 

 wing 18-6, tail 15-5, tarsus 3-5. 



Adult female. Total length 26 inches, wing 16, tail 13, tarsus 3*6. 



Young. Above deep chocolate-brown, blackish on the interscapu- 

 lary region, the wing-coverts with small apical spots or margins of 

 white, the median and greater series indistinctly barred with ashy 

 brown ; quills deep brown, tipped with whitish, and broadly 

 banded with black, the interspaces externally shaded with greyish, 

 with which the primaries are outwardly washed ; lower back and 

 rump blackish brown, with concealed bars of white, more distinct on 

 the upper tail- coverts, which are also broadly tipped with white ; tail 

 chocolate-brown, shaded with ashy grey, tipped with whity brown, 

 and crossed with six broad blackish bands ; head white, with broad 

 black tips to the feathers, especially distinct on the nape ; sides of 

 the face blackish, streaked with white, the sides of the neck pale 

 brown, with large subterminal black spots ; cheeks and throat pure 

 white, "\vith a few narrow black lines on the former ; chest white, 

 with a few broad streaks of black in the centre, the sides of the 

 breast brown, varied with broad mesial streaks of black ; rest of 

 under surface of body black, thickly spotted with white, inclining to 

 bars on the flanks and leg-feathers ; under wing-coverts black. 



