BIRDS OB' NORTH AND MIDDLE AMERICA. 767 



Another adult male (no. 116101, coll. U. S. Nat. Mus., obtained April 

 16) has the mandible distinctly light colored, except at tip, thus show- 

 ing the color of the bill to be an inconstant feature in this as well as 

 in some other species of the genus. 



Young. — Above similar to adult, but rather browner, and feathers, 

 especially on back, bindneck, and pileum, showing in certain lights 

 very indistinct narrow terminal bars of dusky; beneath much as in 

 adult, but sides of head and neck, throat, and chest more grayish; 

 sides and flanks faintly mottled with light grayish brown, the flanks 

 tinged with pale buffy. ' 



Galapagos Archipelago (Abingdon and Bindloc islands). 



Cerlhidea fusca Sclater and Salvin, Proc. Zool. Soc. Lond., ]870, 323, 324 ( Abing- 

 don and Bindloe islands, Galapagos Archipelago; coll. Sal vin and Godman). — 

 Salvin, Trans. Zool. Soo. Lond., ix, pt. ix, 1876, 477. — Sclater, Cat. Birds 

 Brit. Mus., xi, 1886, 28.— Eidgwav, Proc. U. S. Nat. Mug., xii, 1889, 105, 

 119, 123, 124, 126 (Abingdon Island); xix, 1897, 502 (monogr.). 



[Certhidea] fusca ScijAter and Salvin, Noni. Av. Neotr., 1873, 16. 



Cerlhidea olivacea fusca Rothschild and Hartbrt, Novit. Zool., vi, Aug., 1899, 

 151 (Abingdon and Bindloe islands). 



CERTHIDEA BECKI Rothschild. 



WENUAN ISLAND CERTHIDEA. 



Similar to C. fu-sca, but darker, especially on sides and flanks; wing 

 longer, (56, nearlj'^ 69 mm., in males, 5^-54 mm. in females), but bill 

 shorter (8-9 mm.); adult male sometimes with an ochraceous patch on 

 throat, the adult female sometimes with the throat tinged with ochra- 

 ceous. Differing from C. olivacea in being darker above, darker and 

 browner on chest, flanks, and sides of breast, and in the adult males 

 not having the throat rufous-cinnamon.^ 



Galapagos Archipelago (Wenman Island). 



Certhidea becki Rothschild, Bull. Brit. Orn. Club, no. liv. May 25, 1898, p. liii 

 (Wenman Island, Galapagos Archipelago; coll. Tring Mus.). 



Certhidea olivacea 6ecK Rothschild and Hartert, Novit. Zool., vi, Aug., 1899, 149 

 (crit.). 



CERTHIDEA DROWNEI Rothschild. 



CULPEPPER ISLAND CERTHIDEA. 



Similar to C. hecki, but larger (wing, 6^ mm., in adult male, 57 mm., 

 in adult female); sides of breast darker, more olivaceous; pileum 

 darker; length of bill from nostril to tip of maxilla, 8-9 mm.'' 



Galapagos Archipelago (Culpepper Island). 



Certhidea drownei Rothschild, Bull Brit. Orn. Club, no. liv. May 25, 1898, p. 



liii (Culpepper Island, Galapagos Archipelago; coll. Tring Mus.). 

 Certhidea olivacea drownei Rothschild and Hartert, Novit. Zool., vi, Aug., 1899, 



150 (crit.). 



'No. 116103, coll, U. S. Nat. Mus. 



' Description adapted from Rothschild and Hartert. 



'' Diagnosis adapted from Rothschild and Hartert. 



