1875.] ORNITHOLOGY OF MADAGASCAR. 73 
them, however, narrowly margined with fulvous ; upper tail-coverts 
white, banded with brown, the subterminal bars broader and shaded 
with greyish ; tail silvery grey, whitish at tip and crossed with seven 
blackish bands, the subterminal ones the broadest, these bands di- 
minishing in number on the outer feathers, where only five can be 
counted, the bases of the outer feathers white on the inner web; 
upper wing-coverts black, a few of the feathers terminally margined 
with whity brown or white ; edge of wing white, and the outermost 
of the least coverts broadly margined with silvery grey, mesially 
streaked with black along the shaft; median and greater series alter- 
nately barred with black and silvery grey; primary coverts similarly 
banded ; quills black above and below, the secondaries terminally 
margined with white and broadly banded across with silvery grey ; 
lores dusky blackish; eyebrow and sides of face buffy white, very 
narrowly lined with black ; sides of neck fulvescent, streaked with 
black like the nape ; under surface of body pure white, the fore neck 
slightly washed with fulvous, and, like the breast, distinctly streaked 
with blackish brown, these central streaks disappearing towards the 
abdomen and under tail-coverts, where they become mere shaft-lines; 
the flanks streaked with pale rufous; leg-feathers pure white, the 
upper part of the thigh with a few nearly obsolete rufous shaft-lines ; 
under wing-coverts pure white, mesially streaked with black like the 
breast, the outermost of the lower series with a few greyish black 
bars; inner lining of quills black, the bases of inner webs white, 
mottled with blackish vermiculations, the secondaries for the most 
part white below, banded across with greyish black; “‘iris yellow.” 
Total length 22 inches, culmen 1°45, wing 16°9, tail 11, tarsus 3°55. 
Subfamily AquiLInz&. 
Evurriorcuis, gen. nov. 
Belongs to the group of bare-legged Eagles, and is closely allied to 
Spilornis and to Dryotriorchis, more particularly to the last, as 
might have been expected. It differs principally in having a full and 
rounded crest, all the plumes being rounded and not lanceolate; and 
it is unlike any of the other Harrier-Eagles in the extreme shortness 
of the wing, while the tail is inordinately long and equals the wing 
in dimensions. Just as Urotriorchis macrurus is the longest-tailed 
form of Goshawk yet known, so Eutriorchis is the longest-tailed 
Harrier-Eagle yet discovered. From Spilornis, which it resembles in 
the fulness and form of its crest, it differs in the length of tail and in 
its feathered lores. The type is 
EvuTRiorcHIs ASTUR, sp.n. (Plate XIII.) 
General colour above dark brown, most of the feathers of the 
head and back with narrow terminal margins of white to the feathers, 
some of the coronal plumes margined with dull rufous; crest very 
full and uniform with the back, the lateral plumes narrowly barred 
with white ; most of the dorsal feathers exhibit bars of darker 
brown on being examined, these bars being more distinct on the 
upper wing-coverts, which are otherwise brown like the back; quills 
