Carriker : List of the Birds of Costa Rica. 759 



Bangs Collection: La Vijagua and Carrillo (Underwood). 



C. H. Lankester Collection: Miravalles and El Hogar. 



Fleming Collection: Carrillo and "Pozo Azul de Pirris" (Underwood). 



Carnegie Museum: Guapiles and Guacimo (Carriker & Crawford), 



Guacimo, Cuabre, Rio Sicsola, Carrillo, El Hogar, Miravalles (Carriker). 



Nineteen skins. 



This wren has a wide distribution in Costa Rica, but is not common 

 anywhere. It is found over the whole of the Caribbean lowlands and 

 slope up to about 2,000 feet, and on the Pacific slope north of the Gulf of 

 Nicoya (Miravalles). It is very rare on the Pacific side, there being no 

 other records for Guanacaste besides a bird taken at Miravalles by Mr. 

 Lankester. In Mr. Fleming's collection there is a specimen labelled 

 Pozo Azul (Underwood), but I doubt very much the authenticity of the 

 labelling. Underwood is very careless at times about his labelling, keeping 

 no written record of his collection, so that there is always a question about 

 one of his birds which comes from a doubtful locality, when not substan- 

 tiated by other records. 



It inhabits the dense thickets and vine-covered jungle rather than more 

 open woodland, and as a rule keeps rather higher up in the trees than most 

 of the wrens. It is generally very quiet, does not scold or chatter, and 

 keeps well concealed. Its song is very different from that of the other 

 members of the genus and for a long time I never associated it with this 

 bird, but thought it was the whistling of a trogon (T. caligatus or atri- 

 collis tenellus). It consists of two high-pitched whistling notes and always 

 sounds much farther away than it really is. 



A nest was secured at Jimenez, May 9, 1905, containing three eggs, very 

 badly incubated, so much so that but one could be preserved. The nest 

 is a dome-shaped structure, made of weed-fibres, moss, and fine grass, and 

 lined with very fine vegetable fibres and a few feathers. It was placed 

 on a horizontal limb of a small tree on the edge of the forest, the limb con- 

 taining the nest projecting out into the open, and about eight feet from the 

 ground. The nest measured in inches about 6.5 outside diameter; 5 

 outside depth; cavity, about 2.5 in diameter. The eggs are white, 

 with a slight bluish tinge, unmarked. The one remaining egg measures: 

 19.5x14 mm. 



540. Thryophilus semibadius (Salvin). 



Thryothorus semibadius Salvin, P. Z. S., 1870, 181 (Bugaba, Veragua; coll. 



Salvin and Godman). 

 Thryophilus semibadius Salvin and Godman, Biol. Centr.-Am., Aves, I, 1880, 



