THE BIRDS OF THE NATUNA ISLANDS 69 



deep olive buff; lining of wing straw yellow; "naked orbital skin 

 blue;" "feet pale greenish." 



It is a little surprising to find that the small islands near Bnngiiran 

 Island are inhabited by a race of this species different from Mixornis 

 rubicapilla ereretti, which apparently is confined to the latter area. 

 This new race differs from Mixornis rubicapilla zophera of the Anamba 

 Islands in smaller size, darker, more rufescent upper parts, and in 

 narrower streaks on throat and jugulum. It is thus geographically 

 a narrowly streaked race between two broadly streaked forms. 



Eleven specimens of this new subspecies were obtained by Doctor 

 Abbott, as follows: 



Adult male (type), U.S.N.M. No. 174795, Pulo Lingung, near 

 Bunguran Island, June 14, 1900. "Feet pale greenish; naked orbital 

 skin blue." 



Adult male, U.S.N.M. No. 174793, Pulo Lingung, near Bunguran 

 Island, June 14, 1900. "Iris yellowish white; upper mandible dark 

 horn brown; lower mandible leaden." Length in flesh, 146 mm. 



Adult male, U.S.N.M. No. 174794, Pulo Lingung, near Bunguran 

 Island, June 17, 1900. Length in flesh, 136 mm. 



Adult male, U.S.N.M. No. 174792, Pulo Kombeh, near Bunguran 

 Island, June 19, 1900. "Iris grayish brown." Length in flesh, 

 133 mm. 



Adult male, U.S.N.M. No. 174788, Pulo Laut, August 3, 1900. 

 Length in flesh, 140 mm. 



Adult male, U.S.N.M. No. 174791, Pulo Laut, August 13, 1900. 

 Length in flesh, 143 mm. 



Adult female, U.S.N.M. No. 174790, Pulo Laut, August 7, 1900. 

 Length in flesh, 136 mm. 



Adult female, U.S.N.M. No. 174789, Pulo Laut, August 3, 1900. 

 "Iris pale greenish yellow; naked skin about eyes dull blue; feet dull 

 greenish." Length in flesh, 133 mm. 



Adult, sex unknown, U.S.N.M. No. 174787, Pulo Laut, August 3, 

 1900. Length in flesh, 133 mm. 



Adult, sex unknown, U.S.N.M. No. 174786, Pulo Laut, August 3, 

 1900. Length in flesh, 140 mm. 



Juvenal, sex unknown, U.S.N.M. No. 174785, Pulo Laut, August 

 9, 1900. Length in flesh, 140 mm. 



All the adults are more or less in molt, those taken during June 

 showing it only a little and only among the contour feathers, while 

 those obtained in August have both quills and contour feathers 

 heavUy involved. The single juvenile. No. 174785, taken on August 

 9, exhibits evidences of molt among only the contour feathers. 



There is in this series considerable individual variation in color 

 on the upper surface, as some specimens are much less rufescent 

 than others. The juvenal plumage is lighter, less rufescent above 

 than that of the adult. 



