THE BIRDS OF THE NATUNA ISLANDS 



67 



brown, the outer edges of the feathers basally of the same color as 

 the edgings of the wing quills; wings dull sepia verging slightly toward 

 fuscous, the inner edges of wing quills basally light buff, shading more 

 distally into light ochraceous-buff; inner scapulars and superior wing 

 coverts burnt sienna verging a little toward Sanford's brown, the 

 tertials and the edges of the primaries and secondaries shading from 

 Sanford's brown toward auburn; sides of head and of neck, including 

 the superciliary region, together with chin, throat, and upper breast, 

 slate gray, verging toward deep neutral gray; remainder of lower 

 parts pale neutral gray, the middle of abdomen paler, the sides, 

 flanks, and middle abdomen washed with dull bufi'y; lower tail coverts 

 washed with brownish; thighs neutral gray, washed inferiorly with 

 brownish; lining of wing light buff. 



This new subspecies from the Natuna Islands is much more closely 

 allied to Cyanoderma erythroptera erythroptera from the Malay 

 Peninsula, than to Cyanoderma erythroptera bicolor (Blyth) from 

 Borneo. From the latter it differs conspicuously in its strongly 

 rufescent instead of mostly gray or slate-colored crown and cervix; 

 in less brightly ferruginous back; in much paler anterior lower parts, 

 and paler, less buffy posterior lower surface. Thus far it is known 

 from onl}'- the Natuna Islands. 



Measured in the flesh by the collector. 



Type. 



Four specimens are in Doctor Abbott's collection : 



Adult male, U.S.N.M. No. 174797, Bunguran Island, July 1, 1900. 

 "Naked skin about eye dark blue; naked skin on side of neck pale 

 blue; bill leaden blue, blackish above." 



Adult male (type), U.S.N.M. No. 174799, Bunguran Island, 

 July 20, 1900. 



Adult female, U.S.N.M. No. 174798, Bunguran Island, July 5, 1900. 



Adult female, U.S.N.M. No. 174800, Bunguran Island, July 27,1900. 



All these are in nearly completed molt of both quills and contour 

 feathers. There is little individual variation among them, what 

 there is consisting chiefly in the shade of crown and anterior lower parts. 



Measurements in detail are as s;iven in Table 20. 



