ART. 4 BIRDS OF THE MENTAWI GROUP EILEY 7 



MYRISTICIVORA BICOLOR BICOLOR (Scopoli) 



Coluniba (iicolor) Scopoli, Del. Flor. Faun. Insub., vol. 2, 1786, p. 94, 



(New Guinea). 

 Myristickyora bicolor Chasen and Kloss, Ibis, 1926, p. 275. 



Ten males and three females, Sipora. 



The United States National Miisemn also has it from Simalur, 

 Pnlo Babi, and Engano. 



MACROPYGIA EMILIANA ELASSA Oberholser 



Macropygia emiliana elassa Oberholser, Smiths. Misc. Coll., vol. 60, no. 7, 



1912, p. 2 (Sikakap Strait, North Pagi Id.). 

 Macropygia phasianeUa Chasen and Kloss, Ibis, 1926, p. 275. 



Eiffht males and 7 females, Siberut; 10 males and 9 females, 

 Sipora. 



The series secured on Siberut and Sipora is a very fine one, much 

 larger than any series available from any of the neighboring islands. 

 Comparing the females first, as the series of this sex available is more 

 complete from the adjacent islands, it is to be remarked there is con- 

 siderable variation both in measurements and color in specimens 

 from the same locality. In some the tail is quite dark and the feathers 

 broad while in others the tail is lighter and rusty and the feathers 

 narrower. The specimens with rusty tails have the light bars on 

 the mantle yellowish buff, while in the dark-tailed birds these bars 

 are rusty. All indications are that the light or rusty-tailed speci- 

 mens are younger birds. Comparing birds of the same age from 

 Siberut with those from Sipora there appear to be no constant differ- 

 ences in color and apparently none in size. 



The specimens from the Pagi Islands are similar in color to those 

 from Sipora. The series measured averages slightly smaller in the 

 wing, however, but the measurements overlap and for the present, 

 in my opinion, it is best to consider the Siberut, Sipora, and Pagi 

 Islands birds as belonging to the same form. 



Three females from Xias are more rusty on the back and tail, and 

 the black marking on the jugulum is barely indicated or entirely 

 absent ; they average larger than Siberut females. 



One specimen, unsexed but almost certainly a female, from Sima- 

 lur, the type of Macropygia emiliana hypopercna Oberholser ^* is a 

 deeper brown below with the feathers of the wings more heavily 

 margined with lighter and rustier brown, and it is smaller than the 

 Nias bird. The males as far as they go bear out the above remarks. 



" Smiths. Misc. Coll., vol. 60, no. 7, p. 2. 



