104 BIRDS OF BRITISH GUIANA. 



Total length 180 mm., exposed culmen 21, wing 89, tail 71, 

 tai^sus 22. 



Adult female. Similar to the adult male bnt rather smaller. 

 Wing, 85 mm. 



The type from which the description is taken was collected on 

 the Ituribisi River in 1909. 



Having compared British Gruiana birds with a typical specimen 

 o£ A. turdinus turdinus (Pelz.) in .the British Museum, I find 

 that the Guiana .bird differs in being less rufous and more dusky 

 on the head and upper back, more ochreous on the breast and 

 abdomen, paler on the throat, and in having the wing and tail 

 measurements smaller. 



Breeding-season. Unkno^fn. 



Nest. Unrecorded. 



Eggs. Undescribed. 



Range confined to British Guiana. Ituribisi River, Supenaam 

 River, Bartica, Kamakabra River, Bonasika River, Mazaruni 

 River, Arwye Creek (McConnell collection^ ; Bartica (Whitely). 



Habits. Unrecorded. 



417. Automolus albigularis. 



White-throated Automolus. 



Philydor albigularis Salvin & Godman, Ibis, 1884, p. 450 (Mount 



• Eoraima) ; Salvin, Ibis, 1885, p. 420 (Eoraima, 3500 to 6000 ft.). 



Automolus albigularis Sclater, Cat. B. Brit. Mus. xv. p. 93, 1890 



(Roraima) ; Brabourne & Chubb, B. S. Amer. i. p. 241, no. 2443, 



1912. 



Adult male. Entire back and wings rufous-brown ; inner webs 

 of primary and secondary quills dark brown, with buff edgings on 

 the basal portion ; upper tail-coverts and tail rufous-chestnut ; 

 head darlc chocolate-brown ; ear-coverts somewhat similar ; a 

 whitish line over the eye extending along the sides of the crown ; 

 the short feathers on the loral space biiffy-white at the base and 

 dark brown at the tips of the feathers ; chin and throat buffy- 

 white ; breast, abdomen, and sides of the body ochreous-brown, 

 somewhat darker on the last ; under tail-coverts rufous-brown ; 

 under wing-coverts cinnarnon-rufous ; quills below pale brown 

 with pale rufotis on the inner edges of the feathers ; lower aspect 

 of the tail rufous. 



