xvi SYSTEMATIC ARRANGEMENT OF THE GENERA OF BIRDS 
nostrils oval; wings long; the first four feathers deeply notched on their 
inner webs; tail not forked. Hinder aspect of tarsus scutellate. 
61. Crrcus (Harriers). Head surrounded by a circle of feathers; tarsi, 
long and slender, feathered a little below the joint; wings long 
third and fourth primaries the longest ; tail long, somewhat rounded, 
Page 147 
62. Butto (Buzzard). Lore without feathers; tarsi short and strong, 
naked or feathered; wings large, the fourth primary the longest. 
Page 150 
63. Prernis (Honey Buzzard). Lore with feathers; tarsi short and 
strong, naked or feathered; wings large, the fourth primary the 
longest. Page 151 
SUB-FAMILY AQUILINZ 
Bill stout, convex or slightly angular above, straight at the base; much 
hooked at the tip, commissure simply festooned; cere bristly; nostrils 
rounded or oval; wings long. Hinder aspect of tarsus reticulate. 
64. AguiLta (Eagles). Upper mandible with the cutting edge nearly 
straight; tarsi feathered to the toes; claws unequal, grooved 
beneath ; wings with the fourth primary longest. Page 152 
65. HaxrAftus (Sea-eagle). Bill very long; edges of the upper man- 
dible slightly prominent near the hook; tarsi half-feathered ; 
claws unequal, grooved beneath; wings with the fourth primary 
longest; nostrils transverse, with bony margin all round, 
Page 153 
66. Panpfon (Osprey). Bill short, cutting edges of the upper mandible 
nearly straight; tarsi naked; outer toe reversible; claws equal,' 
rounded beneath; wings with the second primary longest. 
Page 154: 
SUB-FAMILY ACCIPITRIN& 
(LONG-LEGGED HAwks) 
Bill short, strong, curved from the base; edge of the upper mandible 
with a prominent festoon beyond the middle ; nostrils oval ; wings rounded,| 
short, reaching only to the middle of the tail; middle toe much the 
longest. 
67. AccfpirER (Sparrowhawk). Tarsi long and slender ; fourth and fifth 
primaries equal in length and the longest. Ridge of bill measured 
from margin of cere is less than half middie toe (without claw). 
Page 156 
SUB-FAMILY MILVINZ 
Bill of moderate length, slightly curved from the base, upper mandible 
witb a slight festoon; nostrils oval, oblique; wings long; tail long and 
forked. 
68. Muirvus (Kites). Tarsi feathered a little below the knee; fourth 
primary the longest. Page 158 
SUB-FAMILY FALCONINZ 
Bill short, strong, curved from the base , upper mandible strongly toothed, 
lower notched ; nostrils round ; tarsi strong and short ; hinder aspect reticu- 
late; wings long and pointed, with the second primary longest, the first 
and third equal in length and having the inner web notched near the 
extremity. 
69. Fatco (Falcons, Merlin, Hobby and Kestrel), Characters given 
above. Page 159 
