768 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



CERTHIDEA CINERASCENS Ridgway. 

 GRAY CERTHIDEA. 



Similar to C. fmca, but much grayer above and whiter beneath, and 

 bill smaller (length from nostril to tip of maxilla not exceeding 8.5). 



Adult wffife.— Above plain dull brownish gray, beneath wholly dull 

 grayish white, faintly tinged with buffy, especially along sides; bill 

 black, basal half of mandible horn color; legs and feet black; length 

 (skin), 97.8; wing, 50.8; tail, 35.6; exposed culmen, 9.4; bill from 

 rictus, 11.4; tarsus, 18.5; middle toe, 10.9.^ 



Galapagos Archipelago (Hood Island and Gardner Island, near Hood 

 Island). 



C'erlhidea cinerascens Ridgwav, Proc. U. S. Nat. Mus., xii, no. 767, Feb. 5, 1890, 



105, 119, 127 (Hood I., Galapagos Archipelago; coll. U. S. Nat. Mus.); xix, 



1897, 503 (monogr.). 

 Certliidea cinerascens cinerascens Rothschild and Haetert, Novit. Zool., vi, Aug., 



1899, 151 (Hood I. and Gardner I., near Hood). 

 Certhidia cinerascens Baur, Am. Nat., xxxi, 1897, 783 (Gardner I., near Hood). 

 Cciiliidea olirascens (laspus penna) Ridgway, Proc. U. S. Nat. Mus., xii, 1890, 



124 (Hood I.). 



CERTHIDEA BIFASCIATA Ridgway. 

 BARRINOTON ISLAHTD CERTHIDEA. 



Similar to C cinerascens, but still whiter (entirely almost pure white) 

 beneath, and wing with two broad whitish bands across tips of greater 

 and middle coverts. 



Adult. — Above brownish gray, becoming very much paler on the 

 rump; wings and tail dusky, the feathers broadly edged with grayish 

 brown; middle wing-coverts broadly tipped with pale dull buffy, and 

 greater coverts with dull white, producing two conspicuous bands 

 across the wing; lores, orbits, cheeks, and entire under parts uni- 

 form dull white; maxilla dark brown, with whitish tomia; mandible 

 whitish; legs and feet brownish black; length (skin), 86.4; wing, 60.8; 

 tail, 35.6; exposed culmen, 10.2; tarsus, 19.8; middle toe, 12.2.^ 



Three specimens from Barrington Island agree in the above char- 

 acters. 



Galapagos Archipelago (Barrington Island). 



Certhidea bifasdata Ridgway, Proc. U. S. Nat. Mus., xvii, no. 1007, Nov. 15, 1894, 

 359 (Barrington I., Galapagos Archipelago; coll. Dr. G. Baur^); xix, 1897, 

 504 (monogr.). 



Certhidea cinerascens bifasciata Rothschild and Hartert, Novit. Zool., vi, Aug., 

 1899, 151 (Barrington 1.). 



'Type, no. 116069, coll. U. S. Nat. Mus., Hood Island, Galapagos, Apr. 7, 1888. 

 ^Type, no. 593, coll. Dr. G. Baur (now in coll. Tring Mus.), Barrington Island, 

 Galapagos, July 9, 1891. 



