68 BULLETIN 98, UNITED STATES NATIONAL MUSEUM. 



Nearly adult male (type), No. 170972, U.S.N.M.; Pulo Siantan, 

 September 8, 1899. 



Immature male, No. 170971, U.S.N.M.; Pulo Siantan , September 

 5, 1899. 



Juvenal female, No. 170973, U.S.N .M.; Pulo Siantan, September 

 9, 1899. 



Juvenal female, No. 171006, U.S.N.M.; Pulo Mobur, August 26, 

 1899. "Bill horn brown, orange beneath at base." 



Unfortunately neither of our two males is fully adult; but the 

 plumage of the lower parts, in the type particularly, is practically 

 complete; while there are enough new slate blue feathers of the 

 adult plumage on the upper surface to show the difference in color 

 between the Anamba. birds and those from the Malay Peninsula. 

 The contrast between the females, both adult and young, of these 

 two races is even more striking. The present form is, by reason of 

 its much paler throat and upper surface, still more different from 

 Dicaeum trigonostigmum antioyroctum Oberholser, 1 of Simalur Island; 

 Dicaeum trigonostigmum lyprum Oberholser, 1 of Nias Island; and 

 Dicaeum trigonostigmum melanthe Oberholser, 1 of Pulo Lasia, western 

 Sumatra. 



Both of the males (the type, No. 170972, U.S.N.M., September 8, 

 and No. 170971, U.S.N.M., September 5) are molting from the juvenal 

 into the adult plumage, the former specimen with this molt about 

 three-quarters complete; the latter with about a third part of the 

 adult orange and a third of the adult blue-gray feathers of the lower 

 parts, but with only a few scattered adult feathers in the plumage of 

 the upper surface, wings, and tail, which are still in juvenal livery. 

 The juvenal plumage of the male is practically like that of the adult 

 female. One of the juvenal females (No. 171006, U.S.N.M., August 

 26) is in complete juvenal plumage, and shows no evidence of molt. 

 In this stage the anterior lower parts are darker, duller, more slaty 

 than in the adult. The other female (No. 170973, U.S.N.M., Septem- 

 ber 9) is about a third molted into the adult plumage, all but most 

 of the lower surface of the body being still in juvenal livery. 



Doctor Abbott reported this species common on Pulo Siantan, 

 August 19 to September 6, 1899; also on Pulo Jimaja, September 

 17-28, 1899; and he observed it on Pulo Mata, August 24 to Septem- 

 ber 1, 1899; and on Pulo Telaga, September 14-15, 1899. 



Although none of our specimens are entirely adult, they seem to be 

 nearly or quite full grown. Their measurements are as follows: 



I Oberholser, Smiths. Misc. Coll., vol. 60, No. 7, Oct. 26, 1912, p. 21. 



