576 STRUCTURAL CHARACTERS 



2. FAMILY TURNICIDJE BUSTARD-QUAILS. 



Schizognathous palate; schizorhinal nostrils; sternum with a single pair of notches; oil- 

 gland tufted ; rectrices concealed by coverts. 



(a) Genus Turnix. Wing eutaxic ; hallux absent. (Rare Birds, vol. iv. p. 530.) 



VI 



ORDER: ACCIPITRES 



Palate desmognathous ; nostrils holorhinal ; hinder border of sternum fenestrated, or with 

 a single pair of notches ; caeca vestigial ; oil-gland tufted ; wing diastataxic ; apteria down- 

 clad ; nostrils impervious, opening into a cere ; young nidicolous, down-clad. 



(a) Genus Aquila. Beak large, curred from the cere forwards ; cutting edge slightly 

 sinuous and ending in a sharp hook ; nostrils oval, impervious ; tarso-metatarsus 

 feathered to the base of the toes. (Vol. iv. p. 78.) 



(6) Genus Haliaetus. Beak large and long ; nostrils oval ; tarso-metatarsus scutellate 

 in front, reticulated behind, shorter than the middle toe. (Vol. iv. p. 80.) 



(c) Genus Circus. Beak small, laterally compressed, cutting edges of upper jaw 



festooned; feathers of face arranged to form a more or less conspicuous disc; 

 wings long; tail long; legs long and slender. (Vol. iv. p. 94.) 



(d) Genus Accipiter. Beak relatively small, cutting edge festooned ; wings short ; tail 

 long; legs and toes very long, the latter with long tylari. (Vol. iv. p. 105.) 



(e) Genus Buteo. Beak relatively small ; cere large ; nostrils oval ; cutting edge of 



upper jaw slightly festooned; tarso-metatarsus short, scutellated; toes short; 



claws large. (Vol. iv. p. 113.) 

 (/) Genus Milvus. Beak relatively small, cutting edge festooned ; nostrils slit-like ; 



wings long; tail long and deeply forked ; tarso-metatarsus short. (Vol. iv. p. 121.) 

 (g) Genus Elanoides. Differs from Milvus in having the tail much more deeply 



forked, and in its black and white coloration. (Vol. iv. p. 535.) 

 (h) Genus Elanus. Nostrils slit-like ; front of tarso-metatarsus covered with minute 



roundish scales ; tail rounded. (Vol. iv. p. 535.) 

 (i) Genus Pernis. Lores densely feathered ; feathers efface " scale "-like in appearance ; 



tail rounded, long; tarso-metatarsus with upper portion feathered; lower end 



reticulated. (Vol. iv. p. 533.) 

 (k) Genus Pandion. Beak large; tarso-metatarsus short, reticulated; outer toe 



reversible ; soles of feet covered with horny spikes ; aftershaft wanting. (Vol. iv. 



p. 127.) 

 (1) Genus Falco. Nostril circular, with a central tubercle ; a strong projecting " tooth " 



near the tip of the cutting edge of the upper jaw; wings long, pointed, second 



quill longest; tarsus short, reticulated. (Vol. iv. p. 133.) 



VII 



ORDER: ANSERIFORMES 



Palate desmognathous ; nostrils holorhinal ; basipterygoids sessile ; posterior border of 

 sternum with a single pair of notches ; trachea with two pairs of extrinsic muscles ; aftershaft 

 small ; wing diastataxic ; oil-gland tufted ; a thick underclothing of down ; young nidifugous. 



1. FAMILY ANATIDJE 



Beak having the upper jaw of a more or less inverted trough-shape, with lamellated or ser- 



