7(U BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Young. — Similar to the adults l)ut plumag-e of looser texture; 

 middle and greater wing-coverts margined terminally with cinnamon- 

 buflfy; superciliary region, chin, throat, and chest dull hutfy whitish 

 or very pale dull grayish ])uffy. 



Galapagos Archipelago (James, Duncan, Albemarle, Indet'atiguble, 

 Narborough, and Jervis islands). 



Certhkle.a oliracca Gould, Proc. Zool. Soc. Lond., pt. v, 1837, 7 (Galajjagos 

 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, ])art (James I. ; 

 Indefatigiblel.).— RiDGWAV, Proc. U. 8. Nat. Mas,, xii, 1889, 105, 119, 128, 

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

 C[etiliidea'} oUvacea Bonaparte, Consp. Av., i, 1850, 541. 

 [^Ceithidea] olivacea Sclater and Salvin, Nom. Av. Neotr., 1873, 16. 

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

 148 (James, Duncan, Albemarle, Jervis, Indefatigable, and Nar1)orough 

 islands). 

 Certhidea mlvlid Ridgwav, Proc. U. S. Nat. Mus., xvii, no. 1007, Nov. 15, 1894, 



358 (Indefatigable I.; coll. Dr. G. Baur); xix, b897, 500 (monogr.). 

 Certhidea albemarlei Ridgwav, 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 CERTHIDEA. 



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

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

 no rut'escent color on throat, etc. ;^ bill frequently entirely l)lack; 

 wing, 52. 1-52. S; tail, 85.0-37.C; exposed culmen, 10.2-10.9; tarsus, 

 20.G-21.6; middle toe, 12.2.' 



Adult male. — Above uniform ])right 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 (rathei- ])roadly) pale olive- 

 butt', producing two indistinct ))ands across th(^ wing; superciliary 

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

 and entire under parts light buff-yellowish, deepest on throat, else- 

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

 coverts and under tail-coverts pale yellowish buff'; 1)111 wholly deep 

 black; "iris brown;'' legs and fec^t dark brown; wmg, 54.1; tail, 

 38.6; exposed culmen, 10.2; tarsus, 20.8; middle toe, ll.-l.'' 



Yoiouj }iiale. — 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 freshlj' assumed rufescent feathers on the throat, showing 

 'beyond doubt that a red throat is sometimes attained." (Rothschild and Hartert.), 



^ Thirteen specimens. 



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

 Galapagos, June 17, 1S91. 



