764 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Yoimg.— Similar to the adults but plumage of looser textuj'e; 

 middle and greater wing-coverts margined terminally with cinnamon- 

 buffy; superciliary region, chin, throat, and chest dull buffy whitish 

 or very pale dull grayish buffy. 



Galapagos Archipelago (James, Duncan, Albemarle, Indefatigable, 

 Narborough, and Jervis islands). 



Certhidea oUvaeea Gould, Proc. Zool. Soc. Lond., pt. v, 1837, 7 (Galapagos 

 I.); Zool. Voy. Beagle, iii. Birds, 1841, 106, pi. 44, part (James I.).— 

 Salvin, Trans. Zool. Soc. Lond., ix, pt. ix, 1876, 476, part (James I.; Inde- 

 fatigable I.).— Sclater, Cat. Birds Brit. Mus., xi, 1886, 28, part (James L; 

 Indefatigiblel.).— EiDGWAY, Proc. U. S. Nat. Mus., xii, 1889, 105, 119, 123, 

 125, part (James I.; Indefatigable I.); xix, 1897, 498 (monogr.). 

 C[erthidea] olivacea Bonaparte, Consp. Av., i, 1850, 541. 

 IChthidea} olivacea Sclater and Salvin, Nom. Av. Neotr., 1873, 16. 

 CerOiidea olivacea olivacea Rothschild and Hartert, Novit. Zool., vi, Aug., 1899, 

 148 (James, Duncan, Albemarle, Jervis, Indefatigable, and Narborough 

 islands). 

 Cn-thidea salvini Ridgvvay, Proc. U. S. Nat. Mus., xvii, no. 1007, Nov. 15, 1894, 



358 (Indefatigable I.; coll. Dr. G. Baur); xix, 1897, 500 (monogr.). 

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

 1894, 360 (Albemarle I., Galapagos, coll. Dr. G. Baur); xix, 1897, 500 

 (monogr. ) . 



CERTHIDEA LUTEOLA Ridgway. 

 CHATHAM ISLAND CERTEISEA. 



Similar to C. olivacea, but upper parts brighter olive and under 

 parts distinctly buff-yellowish (except in much abraded plumage); 

 no rufescent color on throat, etc. ;^ bill frequently entirely black; 

 wing, 52.1-52.8; tail, 35.6-37.6; exposed culmen, 10.2-10.9; tarsus, 

 20.6-21.6; middle toe, 12.2.'' 



Adult male. — Above uniform bright olive or buffy olive; wings and 

 tail dusky, the feathers broadly edged with the color of the back, the 

 tips of the middle and greater wing-coverts (rather broadly) pale olive- 

 buff, producing two indistinct bands across the wing; superciliary 

 streak, extending from nostrils to above posterior angle of eye, eyelids, 

 and entire under parts light buff-3'ellowish, deepest on throat, else- 

 where tinged with olive, especially on sides and flanks; under wing- 

 coverts and under tail-coverts pale yellowish buff; bill wholly deep 

 black; "iris brown;" legs and feet dark brown; wmg, 54.1; tail, 

 38.6; exposed culmen, 10.2; tarsus, 20.8; middle toe, 11. 4.''' 



Young male. — Above deep olive-brown, much darker on pileum 

 (approaching sooty on forehead), more fulvescent on rump and upper 



'A single specimen in the large series contained in the collection of the Tring 

 Museum shows some freshly assumed rufescent feathers on the throat, showing 

 'beyond doubt thata red throat issometimes attained." (Rothschild and Hartert), 



' Thirteen specimens. 



'Type, no. 56, coll. Dr. G. Baur (now in coll. Tring Museum), Chatham Island, 

 Galapagos, June 17, 1891. 



