THE BIRDS OF THE NATUNA ISLANDS / 



118. Chalcoparia singalensis borneana KIoss. 



119. Cinnyris ornata zapega Oberholser.* 



120. Cinnyris hrasiliana axaniha Oberholser.'' 



121. Aethopyga siparaja ochropyrrha Oberholsor. 



122. Munia alricapilla brunneiceps Waldeii. 



123. Uroloncha fuscans (Cassin). 



124. Charitociris maculata maculata (Temminck). 



125. Charitociris xanthopygia xanthopygia (Salvador!). 



126. Charitociris percussa ignicapilla (Eyton). 



127. Dicaeum trigonostigmum megastomum Hartert. 



DISTRIBUTION OF NATUNA BIRDS BY ISLANDS 



Bunguran Island, as would naturally be expected, has the largest 

 bird fauna of any of the islands of the Natuna group. Part of this 

 apparent difference may, however, be due to the greater amount of 

 collecting that has been done on this island. From most of the 

 smaller islands there are no bird records at all, and all the islands on 

 which collections have been made, except Bunguran and Sirhassen, 

 have small lists of birds. It is therefore evident that much remains 

 to be learned of this zoologically interesting group of islands. 



So far as our present knowledge goes, only three species are repre- 

 sented in the Natuna Islands by more than one subspecies. These 

 are Mixornis rubicapilla, with Mixornis rubicapilla everetti on Bun- 

 guran Island and Mixornis rubicapilla zaperissa on Pulo Laut and 

 neighboring small islands; Pycnonotus simplex, with Pycnonotus 

 simplex axanthizus on Bunguran and other northern islands, and 

 Pycnonotus simplex perplexus on Sirhassen and other southern islands; 

 and Arachnothera longirostra, with Arachnothera longirostra atita on 

 Sirhassen Island and Arachnothera longirostra rothschildi on Bung- 

 uran Island and Pulo Lingung. 



Of the 11 islands from which we have any records of birds, Myris- 

 ticivora bicolor is known to occur on six, including Sirhassen Island 

 and Pulo Laut; and this species is thus the bird of widest known 

 distribution in the Natuna Archipelago. One other species, An- 

 threptes malacensis erixanthus has been found on five islands, in- 

 clusive of Bunguran and Sirhassen; and the following birds have been 

 reported from four islands: Muscadivores aeneus diatropurus, Psitta- 

 cvla longicauda, Thalasseus bergii pelecanoides, Muscitrea grisola 

 secedens, and Lamprocorax panayensis heterochlorus . No other 

 species have been reported from more than three islands. 



A considerable number of species occur on Bunguran and other 

 northern islands that have not yet been detected on Sirhassen, the 

 other and southernmost of the largest two islands; but as already 

 intimated this may be due to less intensive collecting on Sirhassen 



» New subspecies; described beyond. 



