6 PROCEEDINGS OF THE ISTATIONAL MUSEUM vor.. 75 



there is a perfect gradation from the darkest naped and breasted 

 bird to the gray-naped and ahnost gray-breasted one. Regardless of 

 whether the nape is vinaceoiis or gray, the series averages more vina- 

 ceoiis on the breast and nape than consohrina from Nias. A series 

 from Xortli and South Pagi contains none of the deep vinaceoiis 

 naped or breasted birds; it averages, however, more vinaceous on 

 the hind neck and breast than consohrina from Nias. Two males 

 from Tana Bala, Batu Islands, are like those from the Pagi Islands. 

 I am inclined to think there are two phases of consohrina occurring 

 oh Nias, corresponding to the vinaceous naped and breasted bird on 

 Sipora and Siberut, and that the Mentawi-Batu bird is a variable 

 form distinct from consohrina. 



Summarizing, I will either have to unite all the birds from the 

 islands off the west coast of Sumatra, except Engano, under one 

 name, or recognize a number of forms. The differences between the 

 forms is admittedly slight, but it seems better to recognize them 

 rather than merge them into one variable race. This being the case, 

 I think, considering the material before me, that the following forms 

 can be made out : 



1. Muscadivores aeneus mistus Oberholser (Simalur Island). Six 

 males measure: Wing, 226-240 (229) mm.; five females, wing, 215- 

 225 (222) mm. 



2. Muscadivores aeneus hahiensis Richmond (Pulo Babi and Pulo 

 Lasia). Three males measure: Wing, 237-246 (243) mm.; two 

 females, wing, 232-238 (235) mm. 



3. Muscadivores aeneus consohrinus (Salvadori) (Nias). Eight 

 males measure: Wing, 229-244 (236) mm.; two females, wing, 231- 

 241 (236) mm. A male and a female from Pulo Tuanku, Banjak 

 Islands, I am inclined to place here. The male has a wing 234 mm., 

 and the female 232 mm. 



4. Muscadivores aeneus mciwus Riley. (Batu and Mentawi 

 Islands). The wings of the males from the various islands repre- 

 sented measure as follows : 



Tm'O, Tana Bala, Batu Islands, 227-232 (229.5 mm.). 



One, Siberut, 234 mm. 



Five, Sipora, 224-240 (231.5 mm.). 



Five, North Pagi, 215-245 (231 mm.). 



Six, South Pagi, 222-246 (22S mm.). 



The wings of the females : 



Seven, Siberut, 211-234 (226 mm.). 

 Two, Sipora, 230-232 (231 mm.). 

 Three, North Pagi, 220-228 (226 mm.). 

 Four, South Pagi, 218-228 (222 mm.). 



