SYNAXLAXIS. 97 



Total length 149 mm., exposed culmen 14, wing 60, tail 72, 

 tarsus 21. 



The birds from which the descriptions are taken were collected 

 by Mr. McConnell at Mount Roraima in October 1898. There is 

 another male specimen from the same locality in which the tail 

 measures 79 mm. 



An immature bird, also collected by Mr. McConnell at Mount 

 Eoraima in October 1898, is similar to the adult on the upper 

 surface, but the rufous patch on the nape is more restricted ; 

 under surface for the most part pale ochreous. 



Adult female. Similar to the adult male but slightly paler in 

 colour bolh above and below. Wing 58 mm. . 



There is also an immature bird, sexed as female, in the British 

 Museum which is rust-brown on the whole of the upper surface ; 

 under surface fulvous or tawny, inclining to white on the throat 

 and lower abdomen. 



Having compared and measured a series of eleven birds from 

 Ecuador, which is the type locality of S. albigularis alhigularis, 

 and East Peru, with eight others from British Guiana, I find 

 that the latter are darker rufous on the hinder crown and nape 

 and have the wing and tail measurements larger. 



This subspecies is named in honour of Mrs. F. V. McConnell's 

 only daughter. 



Breeding-season. Unknown in British Guiana. 



Nest. Unrecorded in British Guiana, 



Eggs. Undescribed from British Guiana. 



Range in British Guiana. Mount Roraima, Upper Takutu 

 Mountains, Ituribisi River, Bonasika River, Abary River {McCon- 

 nell collection); Merume Mountains and Mount Roraima ( W lately). 



Extralimital Range. Surinam (JPenard). 



412. Synallaxis guianensis. 



Guiana Spine-tail. 



Motacilla guianensis Gmel. Syst. Nat. i. p. 988, 1789 (Guiana). 

 Synallaxis guianensis Salvin, Ibis, 1885, p. 419 (Bartica Grove) ; 



Sclater, Cat. B. Brit. Mus. xv. p. 46, 1890 (Bartioa Grove); 



Brabourne & Chubb, B. S. Amer. i. p. 230, no. 2321, 1912. 



Adult male. Head, scapulars, and back dark earth-brown with a 

 slight tinge of rufous on the back and scapulars, and the feathers 

 on the fore part of the head have dark centres which impart a 

 more or less scalloped appearance ; wings and tail chestnut ; 



VOL. II. H 



