NO. 1116. PBOCEEDINGS OF THE NATIONAL MUSEUM. 483 



NESOMIMUS TRIFASCIATUS (Gould). 



Orpheus trifasciatus, GovLT), Proc. Zool. Soc, 1837, p. 27 (no locality; coll. J. 

 Gould). 



Mimus trifasciatus, Gray, Zool. Voy. Beag., Ill, Birds, 1841, p. 62, pi. xvi (Charles 

 Island). — Bonaparte, Consp. Av., 1, 1850, p. 277. — Sclater, Proc. Zool. Soc, 

 1859, p. 345.— Scindevall, Proc. Zool. Soc, 1871, p. 127.— Sclater and Sal- 

 vix,Nom. Av.Neotr., 1873, p. 3.— Salvin, Trans Zool. Soc, IX, Pt. ix. 1876, 

 p. 471.— Sharpe, Cat. Birds Brit. Mus., VI, 1881, p. 346. 



Specific characters. — Similar to N. macdonaldi, liidgway, of Hood 

 Island, but pileum and back blackish browu with iudistiuct grayish 

 edgings. 



Range. — Galapagos Archipelago: Charles Island (Darwin). [Ex 

 tiuct!.] 



" Adult — General color above blackish brown, the feathers mottled 

 with obsolete ashy markings on the back, a little plainer on the head, 

 the lower back, and rump, the latter ashy brown, mottled with dark 

 brown centers to the feathers; least wing-coverts blackish brown, 

 edged with ashy whitish; median and greater series blackish, tipped 

 with white and margined with ashy brown ; bastard wing-feathers and 

 primary coverts blackish brown, edged with ashy brown and narrowly 

 tipped with white; quills blackish brown, the secondaries margined 

 with pale reddish brown and tipped with white, the primaries edged 

 with ashy whitish; upper tail-coverts light brown with ashy- whitish 

 margins; tail-feathers dark brown, all but the center ones lighter 

 brown at the tip, the outer ones whitish at the end of either web; lores 

 dusky blackish; over the eye a distinct white stripe; sides of face and 

 ear-coverts whitish, mottled below the eye and on the fore jtart of the 

 ear coverts with dusky blackish tips to the feathers; cheeks and throat 

 and fore neck white, with a slight mustache of dusky blackish; 

 remainder of under surface of body white, the sides spotted with black- 

 ish brown in the form of longitudinal drops; across the chest a band of 

 blackish-brown feathers tipped with white; thighs brown, some of the 

 inner feathers tipped with white; under tail-coverts white, with dusky 

 bases; under wing-coverts and axillaries dark brown, edged with dull 

 white; quills dusky brown, with ashy-fulvous margins to the inner web. 

 Total length, 9.5 inches; culmen, 1.3; wing, 5; tail, 4.2; tarsus, 1.7. 



"The second specimen in the Museum has the chest-band much less 

 developed than in the one described, it being composed of blackish- 

 brown bars instead of forming a broad band across." (Sharpe.) 



No specimens of this form have been collected by any one since 

 Darwin's visit to the Galapagos, and the two examples in the British 

 Museum (the one described by Dr. Sharpe being the type) appear to 

 be the only ones extant. It may possibly still exist upon some island 

 from which no specimens have been secured; but no species of the 

 genus was found on Charles Island by either Mr. Townsend or Messrs. 

 Baur and Adams, and it is not at all unlikely JSF. trifasciatus may be 

 extinct. 



