52 MR. A. BOUCARD ON BIRDS FROM COSTA RICA. [Jan. 15, 



8(i. Mniotilta varia, L. 

 San Carlos, February. 



87. Parula gutturalis, Cab. 



Several specimens, from the Volcano of Irazu, April and May. 

 Killed on the oak trees at an altitude of 6000 feet. 



88. Helminthophaga peregrina, Wils. 

 Several specimens, from San Jose, January, March. 



89. Dendrceca blackburnle, Gm. 

 One specimen, from Naranjo, April. 



90. Dendrceca pensylvanica, L. 

 San Carlos, February. 



91. Dendrceca .estiva, Gm. 



Several specimens, from San Jose, January, March. 



92. Dendrceca vieilloti, Cassin. 



One single specimen, from Puntarenas, killed in May on the 

 mangrove trees, in close proximity to the river. 



93. Geothlypis trichas, L. 



Several specimens, from San Jose and Cartago, January to May. 



94. Geothlypis poliocephala, Baird, var. caninucha, Ridgw. 

 Only two specimens, from San Jose, killed in January and 



February. 



95. Myodioctes pusillus, Wils. 



Several specimens, killed at San Jose* in January. 



96. Basileuterus mesochrysus, Sclat. 



Many specimens, from San Jose* and Cartago, January to May. 



97. Basileuterus culicivorus, Licht. 

 San Jose, January to May. 



98. Basileuterus uropygialis, Sclat. 



Only one specimen, from San Carlos, killed in February. It is a 

 very rare species, living along the streams in the forest. It never 

 rests, but is constantly going up or down the river from one place to 

 another, sitting on stones or scratching the ground. I saw several 

 specimens in the same place, but could only get one, as it is a very 

 wild bird. 



99. Setophaga ruticilla, L. 



Several specimens, from San Jose" and Cartago, January and April. 



