THE BIRDS OP THE NATUNA ISLANDS 31 



longest tertial black like the primaries, but its exterior web dull, dark, 

 olive-green, broadly margined with pale lemon yellow; other tertials, 

 lesser, median, and innermost greater wing coverts, olive-green, the 

 inner greater coverts mth subterminal portion black, and broad 

 oblique tips pale lemon yellow, the median coverts similarly tipped; 

 sides of head warbler green ; sides of neck and of breost like the cervix ; 

 chin oil yellow; throat and jugulum warbler green; breast oil yellow; 

 middle of abdomen amber yellow; sides slate gray overlaid by warbler 

 green ; flanks and thighs ivy green streaked with amber yellow and pale 

 lemon yellow; lower tail coverts basally, and the longest feathers also 

 medially, neutral gray, succeeded by russet, and tipped and edged 

 with cinnamon, pale dull cinnamon, and light ochraceous-buff ; lining 

 of wing slate gray, the edge of the \ving washed with olive-green. 



Five specimens were obtained by Doctor Abbott, as follows: 



Adult male, U.S.N.M. No. 174673, Bunguran Island, July 28, 

 1900. "Bill leaden blue; cere greenish yellow; feet reddish purple; 

 iris in two rings, inner blue, outer pink." Length in flesh, 298 mm. 



Adult male, U.S.N.M. No. 174671, Pulo Laut, August 7, 1900. 

 Length in flesh, 318 mm. 



Adult male, U.S.N.M. No. 174670, Pulo Laut, August 13, 1900. 

 Length in flesh, 292 mm. 



Adult female (type), U.S.N.M. No. 174674, Sirhassen Island, 

 June 8, 1900. Length in flesh, 267 mm. 



Adult female, U.S.N.M. No. 174672, Bunguran Island, June 22, 

 1900. "Bill leaden; cere green; feet purplish red; iris in two circles, 

 inner blue, outer pink." Length in flesh, 279 mm. 



All these specimens show evidences of molt in both quills and con- 

 tour feathers. A female has been chosen as the type of this new- 

 race, because she exhibits better than the male the differences from 

 the most nearly related forms. The type is somewhat darker than 

 the other female in Doctor Abbott's collection, owing to her almost 

 wholly freshly molted plumage. The three males are very uniform 

 in color. 



Measurements are given in Table 5. 



This Natuna Islands race is related perhaps most closely to Dendro- 

 phassa vernans adina ^ from the Anamba Islands, and the males of the 

 two are difficult to distinguish; the female of the Natuna form, how- 

 ever, besides being slightly more greenish above, is decidedly more 

 yellowish below, where also darker, less whitish posteriorly, and on 

 the under tail coverts darker. 



Doctor Abbott reports this bird fairly common on Sirhassen Island. 



'< Oberholscr, U. S. Nat. Mus. Bull. 98, p. 20, June 30, 1917. 



