86 



BULLETIN 159, UNITED STATES NATIONAL MUSEUM 



Adult male, U.S.N. M. No. 174820, Bunguran Island, June 23, 

 1900. 



Adult male, U.S.N. M. No. 174818, Bunguran Island, June 22, 

 1900. "Iris pale brown." 



They apparently do not differ in any essential respect from t3^pical 

 Malay Peninsula specimens. Their measurements are given in 

 Table 30. 



Table 30. — Measureinents of specimens of Orthotomus atrogularls major 



' Measured in the flesh by the collector. 



This species has been recorded by Doctor Hartert ^* also from Pulo 

 Pandak. 



ORTHOTOMUS SERICEUS RUBICUNDULUS Chasen and Kloss 



Orthotomus ruficeps rubicundulus Chasen and Kloss, Nov. Zool., vol. 36, no. 2,. 

 p. 279, Apr. 22, 1931. ("Sirhassen Island, South Natuna Islands.") 



The birds of this species from the Natuna Islands are in color 

 apparently not different from those of the typical Orthotomus sericeus 

 sericeus from Borneo, and are separable only by larger bill. 



The following 4 specimens were obtained bj^ Doctor Abbott: 



Adult male, U.S.N.M. No. 174824, Pulo Subi (north islet), June 

 12, 1900. 



Adult male, U.S.N.M. No. 174823, Brian Island, near Sirhassen 

 Island, May 31, 1900. 



Adult female, U.S.N.M. No. 174821, Sirhassen Island, June 5, 

 1900. "Iris pale yellow brown." 



Juvenal female, U.S.N.M. No. 174822, Brian Island, May 31, 

 1900. 



The adult female is more huffy on the lower parts than are the males, 

 but does not othcr^\'ise differ in color, though in size is of course less. 

 The Juvenal female (No. 174822) is beginning to molt into the first 

 autumn plumage, and has already considerable chestnut on the 

 crown. The adults likewise show indications of feather renewal. 



Measurements are given in Table 31. 



»' Nov. Zool., vol. 2, no. 3, p. 466, Aug. 17, 1895. 



