1894. PROCEEDINGS OF THE NATIONAL MUSEUM. 359 



Habitat. — Indefatigable Island, Galapagos Arcbipelago. 



Adtilt male (Type, No. 438, coll. Dr. G. Baur, Indefatigable Island, 

 Angnst G, 1891). — Above brownish olive (decidedly browner than C. 

 oiivacea)j the pileum and hind-neck quite nniform with the back, etc., 

 but the rump and upper tail-coverts brighter, more tinged with tawny- 

 olive; wings and tail dusky, the feathers edged broadly with the color 

 of the back, inclining ou greater wing-coverts to wood-brown. Supra- 

 loral streak, orbits, chin, and throat, soft ochraceous-buflf, the latter 

 slightly mottled with bufify whitish; rest of under parts pale buff- 

 yellow, deepening on sides and flanks into a more brownish tint. 

 Upper mandible, dark brown; lower, brownish white; "iris, diirk 

 brown ; " "legs, dark horn-brown ; feet, dusky ; length (skin), 3.60; wing, 

 2.10; tail, 1.38; exposed culmen, 0.40; tarsus, 0.81; middle toe, 0.48. 



Females and immature males are much more olivaceous above than 

 those of C. olivacca, and the under i^arts are conspicuously more yellow- 

 ish. 



All of the seven examples, two of which are in the National Museum 

 collection, have the under mandible pale brown or whitish. 



5. CERTHIDEA BIFASCIATA, new species. 



Specific characters. — Most like C. cinerascens, Ridgway, * of Hood 

 Island, but still whiter (entirely almost pure white) beneath, and wing 

 with two broad, whitish bands across tips of greater and middle coverts. 



Habitat. — Barrington Island, Galapagos. 



Adult (type, No. 593, coll. Dr. G. Baur, Barrington Island, July 9? 

 1891).— 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 uniform dull white. 

 Upper mandible dark brown, edged with whitish; under mandible 

 whitish; legs and feet brownish black. Length (skin), 3.40; wing, 2; 

 tail, 1.40; exposed culmen, 0.40; tarsus, 0.78; middle toe,. 0.48. 



Three specimens from Barrington Island agree in the above char- 

 acters. 



6. CERTHIDEA MENTALIS, new species. 



Specific characters. — Similar to 0. /wsc«, Sclater and Salvin, of Abing- 

 don Island, but rather smaller, color darker and less olivaceous, the 

 under parts dull light olive-grayish, becoming pale buffy on chin and 

 under wing-coverts. 



Habitat. — Tower Island, Galnpagos. 



Adult (type. No. 594, coll. Dr. G. Baur, Tower Island, Sept. 2, 1891).— 

 Above uniform deep grayish olive ; chin, throat, and under wing-coverts 

 pale buff, deepest ou chin, that of throat changing gradually on chest 



*Proc. U. S. Nat. Mus., xii, No. 767, p. 105, Feb. 4, 1890. 



