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 scuteUate. 



6i. Circus (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. BuTEO (Buzzard). Lore without feathers ; tarsi short and strong, 



naked or feathered ; wings large, the fourth primary the longest. 



Page 150 



63. Pernis (Honey Buzzard). Lore with feathers; tarsi short and 



strong, naked or feathered ; wings large, the fourth primary the 

 longest. Page 151 



SUB-FAMILY AQUILINM 

 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. Aquila (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. HaliAStus (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. PandIon (Osprey). Bill short, cutting edges of the upper mandible 



nearly straigl t ; tarsi naked ; outer toe reversible ; daws equal, 

 rounded beneath ; wings with the second primary longest. 



Page 154. 

 SUB-FAMILY ACCIPITRINM 

 (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. AccfpiTER (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 middle toe (without claw). 



Page 156 

 SUB-FAMILY MILVINM 

 Bill of moderate length, slightly curved from the base, upper mandible 

 with a slight festoon ; nostrils oval, oblique ; wings long ; tail long and 

 forked. 



68. MiLVUS (Kites;. Tarsi feathered a little below the knee ; fourth' 



primary the longest. Page 158 



SUB-FAMILY FALCONINM 

 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. Falco (Falcons, Merhn, Hobby and Kestrel). Characters giren 



above. Page 159 



