ON A SMALL COLLECTION OF BIRDS FROM COSTA RICA. 



BY 

 Robert Ridgwav, 



Curator of the Department of Birds. 



The specimens referred to in tlie following- notes were kindly sub- 

 mitted by the authorities of the Costa Rica National Museum, through 

 Mr. George K. Cherrie, the ornithologist of that establishment. 



1. Rhodinocichia rosea (Less.). 



An adult female from Buenos Aires (No. 3060, Museo Nacional de 

 Costa Rica, March 13, 1892, George K. Cherrie), is similar to 53900, U. S. 

 National Museum, from Pananm (J. McLeannan) ; but owingto its fresher 

 condition the colors are rather purer, particularly the dark slate-color 

 of the upper parts, which becomes browner with age. Its measure- 

 ments are as follows: Length (skin). O.GO; wing, 3.20; tail, 3.15; ex- 

 posed culmen, 0.79; tarsus, 1.07; middle toe, 0.72. 



2. Microcerculus luscinia 8alv. 



An adult female from Burica, Costa Rica (No. 2593, Museo Nacional 

 de Costa Rica, December 15, 1891, George K. Cherrie), is similar to No. 

 53901, U. S. National Museum, from Panama (J. McLeannan), but dif- 

 fers in the following particulars: There are no dusky terminal mar- 

 gins to the feathers of the upper surface; the innermost greater wing- 

 coverts, on the other hand, have indistinct blackish tips; the general 

 color of the wings, particularly the remiges, is appreciably darker; 

 the middle portion of the lower breast and belly is much paler, inclin- 

 ing to dull brownish white, slightly tinged with rusty, each feather 

 showing a central irregular (usually V-shaped) mark of dark grayish; 

 the sides are more strongly tinged with raw-umber or tawny-olive. 

 Length (skin ), 4.00; wing, 2.15; tail, 0.87; exposed culmen, 0.60; tar- 

 sus, 0.87 ; middle toe, O.GO. 



Some of the differences of coloration, as for example the darker hue 

 of the wings and tail, and the stronger rusty tinge on sides, are doubt- 

 less due to the fresher condition of the plumage. 



3. Buthraupis caeruleigularis Clieriie, sp. nov. 



Sp. char. — Similar to i>*. ari^m Scl. aiul Salv., but larger, sides and 

 flanks extensively and uniformly bluish dusky, and chin and throat 

 dull indigo-blue, scarcely darker than top of head. 



Proceedings Katioiial Mtisouih. Vol. XVI — No. 956 



Proc. N. M. 93 39 md 



