Vol, XXII, pp. 29-38 March 10, 1909 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



NOTES ON SOME RARE OR NOT WELL-KNOWN COSTA 



RIG AN BIRDS. 



BY OUTRAM BANGS. 



From December, 1907, to June, 1908, C. F. Underwood 

 was in the field collecting birds in Costa Rica; all the material 

 gathered during this time came to me. Many rare species, and 

 some new to Costa Rica, were secured, and in the following 

 notes I list those that are of special interest. 



The principal places worked by Underwood on this trip were 

 the Volcan de Tenorio and the Cerro Sta. Maria, northwestern 

 Costa Rica; La Vijagua in the eastern water shed of the same 

 general range of mountains, toward the Nicaraguan boundary; 

 Bolson, in the lagoon region of the north Pacific faunal area of 

 Costa Rica; and Coralillo, Buenos Aires, and El General, all 

 in the Pacific faunal area. 



Rostrhamus sociabiiis (Vieill.). 



One female everglade kite was taken at Bolson December 28, 1907. The 

 l)ird is of rare occurrence in Costa Rica, and this specimen is the first I 

 have been able to get from that country. 



Aramides cajanea (Mull.). 



One young female, al)out one-third grown, in nestling plumage and 

 without wing feathers, was secured at El General June W, 1908. In color 

 it differs but little from adults, having rufous underiiarts and a gray neck, 

 the gray color somewhat obscured by tufts of reddish-brown down. It 

 proves conclusively that the wood rails of this section of the genus do not 

 pass through a gray juvenile plumage. 



Leptotila plumbeiceps Scl. tt 8alv. 

 Two adult males of this dove were taken at Bolson, one December 18, 

 the other December 29, 1907. This is, I believe, the farthest soutli that 

 the species has been traced and the first Costa Rican record. Leptotila 

 3— Pkoc. Biol. Soc. Wash., XXII, 190'J. (29) 



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