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 



6^. Pernis (Honey Buzzard). Lore without feathers ; tarsi short and 



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



longest. Page 1 5 1 



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. Haliaetus (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 I S3 



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



nearly straigl t ; tarsi naked ; outer toe reversible ; claws 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 MILVINjE 

 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 Uttle below the knee ; fourth 



primary the longest. Page 158 



SUB-FAMILY FALCONING 



Bill shcrt, 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, Merlin, Hobby and Kestrel). Characters given 

 above. Page 159 



