352 



SNODGRASS AND HELLER 





MEASUREMENTS OF ADULT SPECIMENS OF Certhidea otivacect 



luteola. 



73<r. CERTHIDEA OLIVACEA RIDGWAYI Rothschild and 



Hartert. 



Certhidea olivacea ridgwayi ROTHSCHILD AND HARTERT, Novit. Zool., 



vi, p. 149, 1899 (Charles Island). 

 Certhidea ridgwayi RIDGWAY, Bull. U. S. Nat. Mus., No. 50, Pt. n, p. 765, 



1902. 



Range. Charles. 



We did not procure any specimens of this species. It is rare on 

 Charles and has been taken only by the Harris expedition. According 

 to Rothschild and Hartert it " differs much from C. olivacea olivacea 

 and C. olivacea luteola in the much lighter under surface, which 

 wants the olive tinge." 



73</. CERTHIDEA OLIVACEA FUSCA (Sclater and Salvin). 



Certhidea fusca SCLATER AND SALVIN, Proc. Zool. Soc. Lond., p. 323, 1870 

 (Abingdon and Bindloe Islands). RIDGWAY, Proc. U. S. Nat. Mus., 

 xix, p. 502, 1896; Bull. U. S. Nat. Mus., No. 50, Pt. n, p. 766, 1902. 



Certhidea olivacea fusca ROTHSCHILD AND HARTERT, Novit. Zool., vi, p. 151, 

 1899. 



Range. Abingdon and Bindloe. 



Slightly darker above and less olivaceous than C. olivacea olivacea 

 or C. o. luteola, distinguished from these forms by the conspicuous 

 buffy brown wash along the sides and on the flanks. Throat of the 

 male tinged with rufous, and superciliary line of same color present. 

 We have five specimens of this form, including one male with the bill 

 entirely black, taken in June. 



The buffy brown color of the sides of the body and the flanks 

 characterizes all the specimens from Abingdon, Bindloe, Tower, 

 Wenman and Culpepper ; thus uniting C. olivacea fusca, mentalis 

 and becki as a group inhabiting the northern islands of the archipelago 

 and separating them from C. olivacea olivacea of the central islands. 

 The brownish-buff color, however, grades into the less pronounced 

 olivaceous-buff of the same parts in C. olivacea olivacea and C. o. 



