AltT. 4 



BIEDS OF THE MENTAWI GROUP PJLEY 



41 



The above series and specimens from South Pagi Island appear to 

 be identical. 



The Nias Island form has been named D. t. lyprum by Oberholser.*^ 

 AVith it I would place a male from Pulo Pinie, Batu Islands, which 

 appears to have a somewhat lighter throat. 



Simaliir Island specimens are larger than those from Nias or the 

 Mentawi Islands and the female is quite different from that of any 

 other form examined. It is darker, and grayer above with very little 

 olive green wash and the rump is only crossed by a narrow band of 

 yellowish citrine; below it is grayer, the breast with only a narrow 

 band of barium yellow down the center. It has been named Dicaeimi 

 iririonostigtna antioprochmi Oberholser.*" Dicaeuni trigonostigma 

 melcmthe Oberholser from Pulo Lasia was evidently founded upon a 

 single male. It agrees with Simalur Island specimens in size; in 

 color it is slightly darker above and on the throat. The differences 

 are so very slight that in my opinion it should be merged with the 

 Simalur form. 



Summarizing, I am prepared to recognize three subspecies from the 

 west Sumatra islands as follows : . t 



(1) Dicaeuni trigonostigmum pagense Oberbolser. Mentawi Islands 

 (Siberut, Sipora, South Pagi). 



(2) Dicaeum trigonostigmum lyprum Oberholser. Nias Island and Pulo 

 Pinie, Batu Islands. 



(3) Dicaeum trigonostigmum antioproctuni Oberholser. Simalur Island 

 and Pulo Lasia. 



Outside of the Simalur Island form, which is characterized like so 

 many of the races from this island by superior size, the other two 

 subspecies are not strikingly different in color or size from D. t. 

 tr'igonostiginmih of the mainland, and if it were not for their insular 

 habitat would hardly be worthy of recognition. The only differences 

 between the mainland form and those from the islands being the 

 somewhat darker upper parts and the more yellow, less orange wash 

 on the rump of the latter. 



Check list of Mentawi birds 



Family TRERONIDAE 



1. Treron curvirostra smicra Oberholser 



2. Dendrophassa vernans mesochloa Ober- 



holser 



3. Muscadivores aeneus vicinus Riley 



4. Myristicivora bicolor bicolor (Scopoli) 



*' Smiths. Misc. Coll., vol. 60, no. 7, 1912, p. 21. 



Siberut 



X 



X 

 X 



Sipora 



North 

 Pagi 



South 



Pagi 

 Islands 



X 



