536 BIBDS OF THE GALAPAGOS AFCHIPELAGO—RIDGWAT. vol.xix. 



bill, 0.35-0.40; basal width of mandible, 0.29-0.32; wiug, 2.G2-2.80; 

 tail, 1.59-1. 7.-); tarsus, 0.82-0.83. 



Ranf/c. — (iala])agos Arrliipelago: Charles Island (Neboux, Kinberg, 

 Townsend, Baur and Adams). 



Adult male.— TyiiBjlso. 11591G, U.S.N.M. ; Charles Island, Galapagos, 

 Ai>ril S, 1888; C. H. Townsend. Entirely uniform deep black, less 

 intense or tinged Avitli olive-slaty, posteriorly, tlie feathers abruptly 

 clear slate-gray beneath the surface; longer under tail-coverts mar- 

 gined terminally with white; bill black, middle portion of mandible 

 underneath, tinged with brown; legs and feet 'orownish black. Length 

 (skin), 5.35; wing, 2.75; tail, 1.72; culmen, 0.75; gonys, 0.41; basal 

 width of mandible, 0.32; basal depth of bill, 0.39 ; tarsus, 0.82; middle 

 toe, 0.00. 



louuficr male. — No. 125962, U.S.N.M. ; same locality and collector, 

 April 1, 1891. Dull black, uniform only on head, neck, and chest, the 

 feathers of upper parts margined with grayisL olive, indistinctly on 

 back, most conspicuously on rump ; feathers of under parts, posterior to 

 chest, margined with pale bufify grayish or olive- whitish, the latter pre- 

 vailing on center of abdomen and on under tail-coverts: bill, legs, and 

 feet as in perfectly adult male. Length (skin), 5.30; wing, 2.80; tail, 

 1.78; culmen, 0.78; gonys, 0.41; basal width of mandible, 0.29; basal 

 depth of bill, 0.38; tarsus, 0.83; middle toe, 0.59. 



Immature male. — Xo. 1259G4, U.S.X.M.; same locality, etc. Above 

 dusky, nearly uniform on pileum, elsewhere broken by olive-grayish 

 margins to the feathers, the middle and outermost greater wing-coverts 

 distinctly margined with pale grayish butty ; sides of head sooty grayish, 

 linely and indistinctly streaked with dusky and dull grayish bufly; 

 chin, throat, and chest blackish dusky, broken by occasional edgings 

 of pale grayish bufify; rest of under parts broadly striped with dusky 

 and pale grayish bufity, the latter prevailing posteriori}'; bill wholly 

 black; legs and feet blackish brown. Length (skin), 5.10; wing, 2.75; 

 tail, 1.75; culmen, 0.79; gonys, 0.45; basal width of mandible, 0.32; 

 basal depth of bill, 0.40; tarsus, 0.82; middle toe, 0.00. 



Adult J'emah'.—:So. 125905, U.S.X.M.; same locality, etc. Similar to 

 the immature male described above (No. 125904, U.S.N.M ). but anterior 

 under parts much more broadly streaked Avith dull whitish; mandible 

 largely light brownish. Length (skin), 4,90; wing, 2.78; tail, 1,59; 

 culmen, 0.79; gonys, 0.42; basal width of mandible, 0.31; basal depth 

 of bill, 38; tarsus, 0.85; middle toe, 0,04. 



Immature female. — Xo. 115918, U.S.X.M.; same locality and collector, 

 Ai)ril 8, 1888. Similar to the adult female, as des(nibed, but featiiers 

 of upper surface more distinctly margined with a more distinctly oliva- 

 ceous hue, the middle and greater wing-coverts broadly margined termi- 

 nally with brownish buff; under parts strongly suttused with ])alc olive- 

 bulfy ; mandible dark brownish, becoming black basally. Length (skin), 

 4.95; wing, 2.02; tail, 1.05; culmen, 0.77; gonys, 0.43; basal width of 

 mandible, 0,30; basal depth of bill, 0,35; tarsus, 0.8;;; middle toe, 0.58. 



