BIRDS 



351 



the cove, and also in the mangrove swamp at Turtle Point. On Nar- 

 boro it vv^as scarce also, although a few individuals were found in the 

 small areas of vegetation on the sides of the central mountain, and 

 others were seen frequently in the mangrove swamps along the east 

 shore. On Narboro they were heard to sing a song resembling txvist'- 

 te-twee . . . e . . . e. 



MEASUREMENTS OF ADULT SPECIMENS OF Cevthidea oUvaceu 



olivacea. 



73^. CERTHIDEA OLIVACEA LUTEOLA (Ridgway). 



Certhidea luteola Ridgway, Proc. U. S. Nat. Mus., xvii, p. 360, 1894, and 

 XIX, p. 501, 1896 (Chatham Island); Bull. U. S. Nat. Mus., No. 50, 

 Pt. II, p. 764, 1902. 



Certhidea olivacea luteola Rothschild and Hartert, Novit. Zool., vi, p. 

 149, 1899. 



Range. — Chatham. 



There are only four specimens in the collection from Chatham. 

 One adult male has a slight amount of rufous on the throat. The form 

 is very similar to C. 0. olivacea, differing from it mainly in being a 

 little darker. The length of the bill from the nostril may be slightly 

 lonsrer. 



