141 
Genus BUTEOGALLUS, Lesson. 
* 
Buteogallus Lesson, Traite Orn. 1831, 83. Type, Falo cequinoctiaUs G.melix. 
Ch.—E xtremely similar to Urubitinga , the main difference being in 
the coloration; but differing somewhat also in the relative proportion of 
the lateral toes and the degree of development of the loral bristles. 
The latter are almost entirely wanting, and the outer toe is not appre¬ 
ciably longer than the inner. 
It is extremely doubtful whether this form should be allowed more 
than subgeneric rank, the resemblance in most respects to Urubitinga 
being so exceedingly close. The points of difference * pointed out above 
are indeed trifling, though characteristic; and although the adult 
plumage is strikingly different from that of any of the species of 
Urubitinga , the young stage is quite similar to that of U. anthracina. 
BUTEOGALLUS JEQUINOCTIALIS. 
Falco a'quinoctiaUs Gm. S. N. i, 1788, 265. 
Buteo cequinoctiaUs Gray, List Acc. B. M. 1848, 37 ; Hand List, i, 1869,9.— Strickl. 
Orn. Syn. i, 1855, 42.— Schl. Mus. P.-B. Buteones, 1862, 18. 
Morphnus cequinoctialis Gray, Gen. iii, App. 1849, 1. 
Hypomorphnus cequinoctiaUs Suxd. Crit. om Levaill. 1858, 25. 
Urubitinga ( Buteogallus ) cequinoctiaUs Rjdgw. Pr. Boston Soc. N. H., May, 1873, 63. 
Buteogallus cequinoctiaUs Scl. & Salt. Nom. Neotr. 1873, 119.— Sharpe, Cat. Acc. 
B. M. 1874, 212. 
Falco buson Daud. Tr. ii, 1800, 168. 
Buteo buson Vig. Zool. Journ. i, 1324, 340. 
Buteogallus buson Gray, List Gen. 1340, 2.— Boxap. Consp. i, 1850, 17. 
Daptrius buson Gray, List Acc. B. M. 1844, 14. 
Morpbnus buson Gray, Gen. i, 1845, 15. 
Le Buson Levaill. Ois. d’Afr. i, 1799, 86, pi. 21.— Suxd. Crit. om Levaill. 1853, 25. 
Rab .—Northern South America. Columbia (Sharpe) ; Demerara 
(Br. Mus., fide Sharpe) ; Cayenne (Mus. Boston Soc.). 
Wing, 12.25-13.40 ; tail, 7.00-7.50; culmen, 1.00-1.05; tarsus, 2.80-3.00 ; 
middle toe, 1.50-1.70. Third quill longest ;* first longer than ninth. Tail 
even, or slightly emarginate. Adult: —Head, neck, and upper parts gener¬ 
ally blackish-brown; lower parts, secondaries (except a broad terminal 
band), and broad borders to the larger scapulars lateritious-rufous, or 
brick-red, the lower parts barred transversely with dusky.. Tail deep 
black, narrowly tipped with white, and crossed about the middle portion 
by a narrow band (generally interrupted) of pale grayish. Young :— 
Above plain dull grayish-brown, the primaries black. Feathers of the 
head, neck, and back narrowly edged with dull ochraceous; secondaries 
obscurely barred with dusky and wing-coverts sometimes bordered with 
ochraceous. Beneath, pale ochraceous (or ochraceous-white), with a 
collar of dusky spots across the lower part of the throat; breast and 
abdomen nearly immaculate; tibia? plain, or faintly spotted transversely 
with dusky. Tail grayish-brown, mixed on the basal half of the outer, 
and on nearly the whole extent of the inner, webs with ochraceous, and 
narrowly and obscurely barred toward the base with dusky. 
Seven specimens examined, in mus. Philadelphia Academy. 
* B. aguinoctialis agrees with U. anthracina in the following important external de¬ 
tails: Retniges 24; outer four primaries with inner webs shallowly sinuated, the sinu- 
ation just appreciable on the fourth. Tail even or slightly emarginated. 
