AVIFAUNA OF LAYSAN, ETC. 



271 



72. ANAS WYVILLIANA, Sd. 



KOLOA MAOLI. 



Duck (of the Sandwich Islands), Bloxam, in Byron's Voy. p. 251 (1826). 



Anas boschas (?), Hartl. in Wiegmann's Arch. f. Naturg. 1852, i. p. 137 (Oahu, in Mus. Berol.) (this is 

 really A. wyvilliana, as examined by Mr. Hartert and acknowledged by Reichenow in a letter to 

 Salvadori) j G. R. Gray, Cat. B. Trop. Isls. p. 54 (1859) (Oahu) j Cass. Pr/ Ac. Phil. 1862, p. 322 ; 

 Finsch & Hartl. Orn. Centralpolynes. p. xxxix, no. 138 (1867) (part., Oahu). 



Anas boschas, var., Hartl. Journ. f. Orn. 1854, p. 170 (Sandwich Is.). 



Anas superciliosa a. sandwichensis (noraen nudum !), Bp. Compt. Rend, xliii. p. 649 (1856) (descr. nulla). 

 Anas superciliosa, var. (partim I), G. R. Gray, Cat. B. Trop. Isls. p. 54 (1859) (Oahu). 



Anas superciliosa (non Gmelin !), Dole, Proc. Boston Soc. N. H. xii. p. 305 (1869) ; id. Hawaiian Aim. 

 1879, p. 55 ; Sclater, Ibis, 1871, p. 360. 



Anas wyvilliana, Scl. P. Z. S. 1878, p. 350 (Sandwich Is., juv.) ; id. Ibis, 1879, p. 92; id. Voy. < Challenger/ 

 Birds, p. 98, pi. xxii. (juv.) (1880) ; id. P. Z. S. 1880, p. 517; Ridgw. Proc. U.S. Nat. Mus. 1878, 

 p. 251 (?) ; Finsch, Ibis, 1880, p. 79; Wallace, Island Life, p. 296 (1881) ; Rchnw. Orn. Centralbl. 

 1882, p. 19; Salvad. Orn. Pap. e Mol. iii. p. 396 (note; 1882); Stejn. Proc. U.S. Nat. Mus. 1888, 

 p. 98 (Kauai) ; Wilson & Evans, Aves Hawaii, pt. iv. plate (1893) ; Salvad. Cat. B. Brit. Mus. xxvii. 

 p. 196 (1895). 



Adult male. (Count Salvadori (I. c.) expressed a doubt whether this is the final nuptial 

 plumage. I, however, have little doubt that the four birds described hereafter are in 

 perfectly complete nuptial dress.) Top of the head blackish, the feathers tipped with pale 

 brown. A dark metallic green stripe from the eyes to the nape. Feathers of the neck 

 blackish, mixed with light brown, those of the upper back and interscapular region 

 blackish brown with crescent-shaped and undulated rufous-brown bands. Lower back, 

 rump, and upper tail-coverts brownish black, with but a few brown feather-edges and 

 spots. Inner tertials and greater scapulars brown, greyish in the middle and narrowly 

 edged with pale brown. Primaries dark greyish brown. The secondaries form a large 

 and fine speculum, bordered behind with a subterminal black line, followed by a white 

 terminal line, and in front by a black line, with a less defined grey band before it. 

 Above the speculum is bordered with a broad velvety-black stripe, formed by the black 

 outer webs of some of the tertials. Rectrices deep brown and blackish, with whitish- 

 brown edges and irregular arrow-shaped markings. The two central rectrices are black, 

 soft, and curled up as in A. boschas in one old male in abraded plumage, the next one to 

 it shows an inclination to curl up (the other corresponding one being absent), and in two 

 other males there is a distinct beginning to curl up. Sides of head and neck and throat 



