THE ISLANDS OF THE BAY OF BENGAL. 131 



Burmese sub-region, in which I include the whole of Pegu, 

 Arakan, Eastern Bengal,' Assam, and the sub-tropical belt run- 

 ning westwards along the bases and up the low valleys of the 

 sub- Himalayan ranges, as far or nearly as far as the Kumaon 

 Bhabur. While 22 belong to several at present inextricably 

 entangled faunas pertaining to the Indo-Malayan, Eastern 

 Asiatic, Archipelagiau and Australian sub-regions. 



The separation of many of these species under these different 

 heads is far from easy, and no two ornithologists probably 

 would do it exactly alike. There are several species that mi edit 

 almost indifferently be referred, looking to their disti'ibution, to 

 either of two of these divisions, and it is unquestionable that if 

 absolute accuracy were insisted on, and it were necessary to 

 place in each division only those species whose ranges were 

 truly identical four times the number of sub-divisions that I 

 have adopted would scarcely suffice. 



Still, as I have already remarked, I believe that on the whole, 

 the groups into which I have thrown these species do approxi- 

 mately represent broad facts of geographical distribution, and 

 sufficiently nearly so to enable us to form some idea of the o-eneral 

 geographical relations of the ornis with which we are dealino-. 



Every ornithologist, however, will probably prefer his own 

 arrangement to mine, and it is therefore desirable to enumerate 

 the species that I have assigned to each sub-division, so that 

 each reader may alter the lists as seems good to him, and by 

 simple addition and subtraction recast the figures for himself. 



First we have those species (40 in number) which, althouo-h 

 for the most part also extending eastwards, some of them north- 

 wards, and a few like Dromas ardeola, westwards to the Arabian 

 and African coasts, are yet, according to my view, widely 

 distributed through, and more or less characteristic of, the Indian 

 sub-region — ; 



25. Accipiter virgatus, Temm., (p. 141.) 



43. Cuncuma leucogaster, GmeL, (p. 149.) 



74. Enhialtes pennatus, Hodgs., (p. 151.) 



81. Ninox hirsutus, Cuv. et Temm., (p. 151.) 



99 bis. Cypselus acuticauda, Blyth, (p. 156.) 



118. Merops Daudini, Cuv., (p. 162.) 



119. „ Swinhoei, Hume, (p. 163.) 

 126. Eurystomus orientalis, Linn., (p. 164.) 

 133. Ceyx tridactyla, Linn., (p. 173.) 



153. Loriculus vernalis, Sparm., (p. 185) 



203. Cuculus micropterus, Gould, (p. 191.) 



261. Lanius cristatus, Linn., (p. 198.) 



270. Graucalus Macei, Less., (p. 204.) 



