592 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XrV. 



size, &c., but in the Lophotriorcliis and Spizaetus we have 2 genera in which 

 the species all have long crests which catch the eye at once and which, if 

 put next to or between two of the crestless eagles, may be confusing. The 

 genus Aquila has 9 species. 



Key io the Species. 

 a. Nostril elliptical or ear-shaped, higher than broad. 

 a' Claws very large, hind claw 2^ to 4 inches 



round curve „ A. chryaaeius. 



(The Golden Eagle.) 

 b' Claws moderate, hind claw very rarely exceed- 

 ing 2 inches round curve. 

 a" Wing in male 21" to 23", in female 23" to 



a^ Plumage deep blackish-brown, crown 



and nape tawny (in adults). 

 b^ Lower plumage striated (in young) .. A . heliaca. > 



(The Imperial Eagle.) 

 c* Plumage deep umber-brown through- 

 out, or a pale patch on the nape 

 only (in adults). 

 d^ Lower pl'image not striated, pale tips > 

 to Ira-ger wing-coverts and to se- 

 condaries (in young)..... A. Ufasciata. 



(The Steppe Eagle<) 

 h" Wing in male under 21", in female 



under 22" ,.,.. A. vindhiana. 



(The Tawny Eagle,) 

 6. Nostril round, as broad as high. 



c' Whole head and lower parts uniformly pale 



tawny or rufous A. fulvescens. 



(Brooks's Eagle.) 

 d' Head and lower parts dark brown, or not 

 uniformly coloured. 

 c" Wing of male 19" to 20", of female 20^" 



to 21g" , A. maculata. 



(The Large-spotted 

 Eigle.) 

 d" Wint,' of male about 18", of female 19" ... A. hasfafa. 



(The Small Indian 

 Spotted Eagle.) 

 The genus Hieraeiiis has but 2 species ; //. fanciatm, and H^ pennatus. 



Key to the species. 

 a. Larger: wing 19 to 21 inches. H. fasciatus. (Bonelli's Eagle.) 

 1\ Smaller: wing 14 tolG'5 inches, H. pennatus. (The Booted Eagle.) 



