BUTEO AUGURALIS. 29 
jakal, the under tail-coverts always incline more or less to rufous, 
which sometimes extends halfway up these coverts. Although, 
through the progress to maturity, the plumages are so different, yet 
in the fully adult black dress it is almost impossible to distinguish 
the present bird from B. jakal; and the only difference we can see 
is, that in the latter species the silvery grey on the wing is lighter, 
while the tail is darker and more decided chestnut. B. jakal gene- 
rally has a rufous breast or ‘apron,’ but not always. The black 
markings on the tail of the latter never reach quite to the end but 
are always subterminal, and form a more or less perfect band. 
Old male.—Black, the base of the quills externally ashy grey with 
black bars; the tail rufous, with black markings near the tip. Total 
length, 20 inches; culmen, 1°55; wing, 16:3; tail, 7°5; tarsus, 3°6. 
Old female.—Similar to the male, but a little larger. Total length, 
24°5 inches; wing, 18°75; tail, 9; tarsus, 3°6. 
Fig. Rupp. ie, tae taf. 16. 
25. Burro AUGURALIS. Salvadori’s Buzzard. 
Specimens of this Buzzard have been procured in Mossamedes and 
the interior of Benguela by Anchieta and Freitas Branco. Neither 
the author nor the editor are personally acquainted with the species, 
and the latter has, therefore, deemed it advisable to translate the 
full descriptions given by Professor Barboza du Bocage.—(Jorn. 
Lisb. II. p. 336). 
Adult male.-—Above dusky blackish, with a white nape-spot, the 
feathers of the back and wings margined with brown; sides of head 
and a cervical collar varied with rufous; forehead, loral space, and 
throat white ; lower throat and breast uniform with back; flanks 
and abdomen white, with large cordiform spots and streaks of black ; 
under wing-coverts white spotted with black; quills dusky blackish, 
the inner webs white towards the base; primaries blackish at tip, 
secondaries banded with blackish; tail above rufous with a broad 
subterminal band of black, underneath greyish ; cere and feet yellow ; 
iris white. 
Young male.—Above dusky rufous, the feathers dusky, edge with 
rufous ; the hind neck more rufous, with a white but less conspicuous 
nape spot; underneath rufous white ; forehead white, streaked with 
dusky ; throat white ; a large patch on each side of the breast dusky 
rufous; flanks and belly with large cordiform spots and streaks of 
