104 BIRDS OF BRITISH GUIANA. 



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

 tarsus 22. 



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

 Wing 85 mm. 



The type from which the description is taken was collected on 

 the Ituribisi River in 1909. 



Having compared British Guiana birds with a typical specimen 

 o£ A. tin'dinus tui^dipns (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 . U n k n o w n . 



I^est. Unrecorded. 



Eggs. Undescribed. 



Range confined to Britisli Guiana. Ituribisi E*ver, Supenaam 

 River, Bartica, Kamakabra River, Bonasika River, Mazaruni 

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



Habits. Unrecorded. 



417. Automolus albig-ularis. 

 White-throated Automolus. 



JPhilydor aJbignlaris Salvin & Godinan, Ibis, 1884, p. 450 (Mount 

 Koraima) ; Salvin, Ibis, 1885, p. 420 (Roraima, 3500 to GOOO ft.)- 



Automolus olbigularis Selater, Cat. B. Brit. Mas. 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 butT edgings on 

 the ba«al portion ; ujiper tail-coverts and tail rufous-chestnut ; 

 head dark chocolate-lirown ; ear-coverts somewhat similar ; a 

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

 the short feathers on the loral space buffy-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 ochroous-brown, 

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

 under wing-coverts cinnarnon-rufous j quills below palo brown 

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

 of the tail rufous. 



