254 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



NESOMIMUS DIERYTHRUS Heller and Snodgrass. 

 INDEFATIGABLE ISLAND MOCKINGBIRD. 



Similar to N. melanotis, but wing and tail shorter, bill averaging 

 shorter, and color of pileiim and dorsal region paler; very similar in 

 coloration to N. adamsi but without trace of submalar dusky streak, 

 color of back averaging darker, lores and auricular region blacker, 

 and sides of breast always unspotted.'* 



Adult wflZ^.— Length (skins), 205-235 (221) ; wing, 105-115 (110.9) ; 

 tail, 103 116 (107.2); exposed culmen, 20-23.5 (22.1); tarsus, 35-37 

 (3(3.1); middle toe, 21-22.5 (21.8).^ 



Adult fe male. ^hength (skins), 200-205 (202) ; wing, 100-105 (102.5) ; 

 tail, 93-103(98); exposed culmen, 19.5-20 (19.7); tarsus, 34-35 (34.5); 

 middle toe, 21. '^ 



Indefatigable, Wenman, and Seymour islands, Galapagos Archi- 

 pelago. 



Mimus melanotis (not Orpheus melanotis Gould) Sclater and Salvin, Proc. Zool. 



Soc. Lend., 1870, 323, part (Indefatigable I.). — Sundevall, Proc. Zool. Soc. 



I.ond., 1871, 124, 126, part (Indefatigable I.; crit.). — Salvin, Trans. Zool. Soc. 



Lond., ix, pt. ix, 1876, 471, part (Indefatigable). — Sharpe, Cat. Birds Brit. 



Mus., vi, 1881, 349, part. 

 [ Mimus] melajiotis Sclater and Salvin, Nom. Av. Neotr., 1873, 3, part. 

 Nesoynimiis melanotis Ridgway, Proc. U. S. Nat. Mus., xii, 1890, 102, part (Inde- 

 fatigable I.); xix, 1897, 489, part (Indefatigable I.). 

 [Nesomimus] melanotis Sharpe, Hand-list, iv, 1903, 105, part (Indefatigaljlc I.). 

 Nesomimus melanotis melanotis Rothschild and Hartert, Novit. Zool., vi, 1899, 



145, part (Indefatigable I.; crit.); ix, 1902, 382, 416 (Seymour, Wennian, and 



Indefatigable islands; crit.; habits; descr. eggs). 

 N[esomimus] melanotis melanotis Rothschild and Hartert, Novit. Zool., vi, 



1899, 200, part (Indefatigalile and Wenman islands). 

 [Nesomim^ls] melanotis melanotis Rothschild and Hartert, Novit. Zool., ix, 



1902, 416, part (Indefatigable, Seymour, and Wenman islands). 

 Nesomimus melanotis dierythrus Heller and Snodgrass, Condor, ii, May, 1901. 



74 (North Seymour I., near Indefatigable, Galapagos Archipelago; coll. I-e- 



land Stanford Ji\ Univ.). — Snodgrass and Heller, Proc. Wash. Acad. 



Sci., v, 1904, 367 (Indefatigable and Seymour islands; crit.; measurements). 

 [Nesomimus] dierythrus Sharpe, Hand-list, iv, 1903, 105. 



NESOMIMUS HULLI (Rothschild). 

 CULPEPPER ISLAND MOCKINGBIRD. 



Similar to N. melanotis, but with whitish terminal margins of rem- 

 iges much broader, and with a distinct blackish submalar streak. 

 Similar also to N. hauri but streaks or spots on back slightly less 



«These characters are taken from the paper by Snodgrass and Heller in Proc. W^ash. 

 Ac. Sci., V, pp. 367, 369, the small series of specimens of this form examined by me 

 being in worn plumage and not suitable for satisfactory comparison. 



*> Nine specimens (eight from Indefatigable, and one from Seymour). 



cTwo specimens from Seymour Island. 



