354 



SNODGRASS AND HELLER 



We have nine specimens from Tower Island taken in June and four 

 from Culpepper taken in December. We can discover no difference 

 whatever between the two sets of specimens either in color or in pro- 

 portion. The series as a whole can be distinguished from the six 

 Abingdon-Bindloe specimens of C. o. fusca by the slightly darker, 

 more brownish and less olivaceous upper parts. The distinction, how- 

 ever, is very slight. Hence, we combine C. o. inentalis (Ridgway) 

 and C. o. dro-jonei (Rothschild) into one variety. 



73/. CERTHIDEA OLIVACEA BECKI (Rothschild). 



Certhidea becki Rothschild, Bull. Brit. Ornith. Club, vii, p. 53, 1898 

 (Wenman Island). — Ridgway, Bull. U. S. Nat. Mus., No. 50, Pt. 11, 

 p. 767, 1902. 



Certhidea olivacea becki Rothschild and Hartert, Novit. Zool., vi, p. 149, 

 1899. 



Range. — Wenman Island. 



This form does not differ in color from C. olivacea mentalis of 

 Tower and Culpepper. According to Rothschild it should be lighter 

 below than C. olivacea droiviiei (Rothschild) of Culpepper, but our 

 specimens from these two islands show absolutely no difference and, 

 as before stated, do not differ in color from the Tower specimen. 

 The bill of the two Wenman specimens, however, is shorter than the 

 bill of C. olivacea metztalis^ and apparently the subspecies may be 

 retained on this character. Males have a distinct rufous tinge on the 

 throat, a pale superciliary stripe and an entirely black bill. 



We have only two specimens, taken in December on Wenman. 



MEASUREMENTS OF ADULT SPECIMENS OF Certhidea oUvacca 



becki. 



74. THE CERTHIDEA CINERASCENS SERIES. 



74a. CERTHIDEA CINERASCENS CINERASCENS 

 (Ridgway). 



Certhidea cinerascens Ridgway, Proc. U. S. Nat. Mus., xii, p. 105, 1889 

 (Hood Island), and xix, p. 503, 1896; Bull. U. S. Nat. Mus., No. 50, 

 Pt. II, p. 768, 1902. 



