Geographical Distribution 365 



little Hawks is that the male has a grey back and the 

 female a chestnut one, a difference in the colour of the 

 sexes which is only found in this particular genus, and yet 

 we find this difference of plumage existing equally in the 

 African and the Burmese species of Falconet. With this 

 curious distribution of an Accipitrine genus must be con- 

 sidered also that of another genus of Hawks {^Erythropus), 

 already alluded to (p. 346). 



C. THE INDIAN REGION. 



This includes the greater part of Southern Asia from the 

 line of the Himalayas and the Yangtze river in China. 

 The Western limit is about 55' E. Long, where the Pahearctic 

 and Indian Regions find a frontier. There are apparently 

 at least five natural Sub-Regions contained within the area 

 of the Indian Region, 



I. THE INDIAN PENINSULAR SUB-REGION. 



Not many genera, but numbers of species are character- 

 istic of this Sub-Region, but throughout there runs a note 

 of affinity to species which inhabit the Ethiopian Region, 

 and we find many Indian genera represented in the latter, 

 especially among the Babbling-Thrushes ( TiDieliidcc), and 

 the Grass-Warblers {Cisticola, Priiiia, etc.), Larks i^AlaiididcE) 

 and Pipits {Ant/uts). 



II. THE INDO-CHINESE SUB-REGION. 



Embraces China south of the Yangtze, .Siam, Cambodia, 

 and the Burmese Provinces. The peculiar species are 

 mostly representatives of those found in the Indian Penin- 

 sular Sub-Region. 



