490 BIRDS OF THE GALAPAGOS ARCHIPELAGO— RTDG WAT. vol.xix. 



tipped with dull white; greater coverts broadly tipped with dull buffy 

 white and edited with light grayisli brown; secondaries edged with 

 liglit grayish brown, more whitish terminally, the tertials with broader, 

 browner edgings which terminate in still broader dull whitish tips; pri- 

 maries, primary coverts, and alula not distinctly edged Avith paler excei>t 

 at tips. Tail dusky blackish, the feathers edged with dull brownish 

 gray; outermost feather with a terminal spot of pale brownish gray 

 l)assing into white at tip, this much broadest (0.(17 of an inch next to 

 shaft) on inner web ; these light-colored tips gradually diminish in size to 

 the middle i)air of rectrices, which have merely a narrow terminal margin 

 of brownish gray. A distinct superciliary stripe of dull grayish white 

 extending from bill to occiput; a whitish crescent immediately beneath 

 eye; lores and entire auricular region uniform sooty blackish, connected 

 by a narrow band beneath the suborbital whitish crescent. Malar 

 region, sides of neck, and entire under parts white, the first minutely 

 speckled posteriorly with dusky; sides and flanks slightly tinged with 

 bufl' and broadly streaked with dusky. Bill black, paler at base of 

 mandible; legs and feet black. Length (skin), 9.2i); wing, 4.10; tail. 

 3.95; exposed culmen, 0.88; bill to rictus, 1.08; tarsus, 1.40; middle 

 toe, 0.80. 



Young male.—^o. 115991, U.S.N.M.; James Island, April 11, 1888; 

 C. H. Townsend. Similar to the adult, as described above, but chest 

 and upper breast thickly marked with triangular spots of grayisli 

 dusky; feathers of i)ileum without grayish margins, except on fore 

 head, and there indistinct; superciliary stripe less distinct, and dusky 

 band on side of head (from lores to auriculars, inclusive) less black, 

 with the center of the auricular region mostly light grajash; wing 

 markings more tinged with buff, especially tips of greater coverts; 

 rump and upper tail-coverts more obviously streaked. 



Adults in worn plumage are much more uniform above, the lighter 

 margins to the feathers of the pileum and dorsal region having disap- 

 peared while the broad whitish collar across the hind neck is unbroken 

 by dusky spotting. 



Owing to the circumstance that so few of the specimens are in good 

 plumage, it is impossible to make satisfactory comparison between 

 si)e(;imens from the dift'ereut islands. Those from Jervis Island (in Dr. 

 Baur's collection) appear, however, to be rather browner (some of them 

 conspicuously so) tiiaii those from James and Indefatigable. 



Dr. Baur's collection contained specimens from James (8), Indefati 

 gable (5), and Jervis (5). 



I have not seen specimens from Charles Island, and doubt the correct 

 identification of the so-called N. melanotis from that locality. 



