212 
ON THE CLASSIFICATION OP BIRDS. 
very wide. Ears large, surrounded by a ruff of small 
thick-set feathers. T arsi very long, slender, smooth. 
{fig- 18 !).) 
C. pygargus. Selby, pi. 10. E. rutilans. PI. Col. 25. 3. 
Muntagui. Vieil. G. 13. E. 
SuBPAM. FALCONIN.®. Falcons. 
Bill short, suddenly curved from the base. The upper 
mandible armed near the tip with a sharp angulated 
tooth, often double, beyond which is a slight festoon ; 
under mandible deeply toothed at the end. Nostrils 
circular ; cere short. Feet moderate ; tarsi slender, 
naked •, middle toe very long, lateral either equal or 
unequal, hinder very short. Wings lengthened, pointed,- 
the second quill longest, and, with the first, deeply 
notched internally, near their tips. Tail rounded. 
Falco, Auct. True Fukoiu. Both mandibles of the 
bill with a single acute tooth near the tip. Nostrils 
round, naked. Wings moderate or long, pointed ; 
the first quill rather shorter than the second, which, 
with the third, are the longest. Tarsi slender, naked, 
with two series of anterior scales fitting into each 
other ; the rest reticulate. Middle toe very long, 
equal to the tarsus ; lateral toes rather unequal ; 
hinder very short. 'I’he anterior claws of almost 
equal size. Soles with prominent pads. 1!)0.) 
E. lanarius. Tem. Man. i. 20. unicolor. W. Af. i. pi. 3. 
peregrinus. PI. Enl. 421. 
subbuteo. PI. Enl. 432. 
iEsalon. N. Z. pi. 25. 
tinnunculus. PI. Enl. 401. 
tinnunculoide.s. T. M. i. 31. 
rufipes. PI. Enl. 431. 
sparverius. N. Z. pi. 24. 
colutnbarius. W. pi. 15. 3. 
femoralis. PI. Col. 345. 
rufescens. W. Af. i. 109. 
ruficollis. W. Af. i. pi. 2. 
rupicolus. O. d’Af. pi. .35. 
tibialis. PI. Col. pi. 29. 
punctatus. lb. 45. 
frontalis. O. d’Af. pi. 28. 
macrodactylus. Ois.d’Af. 
pi. 30. 
and those in Part 5. 
