NOTES ON SOME COSTA RICAN BIRDS. 



BV 



ROHERT RiDGWAY, 

 Citrafor of the Department of Birds. 



For the privilejje of exaininiiig- and reporting ni)on u small but very 

 interesting: collection of birds (Voni that remarkably ]»r()litic country, 

 the author is indebted to the courtesy of the Director of the Costa llica 

 National Museum, Sr. Anastasio Alt'aro. 



W'itli their usual liberality, the authorities of the above mentioned 

 institution have presented all type specimens to the V>. S. National 

 Museum. 



1. Mimiis gilvus (VieilL). 



An adult examide from El Zarcero (altitude about 7,000 feet), collected 

 Marcli 1, 1S87, by Mr. Jose C Zeledon, is apparently identical with the 

 Cohimbian bird. licnfjth (skin), 0.80; wing, t.O"); tail 4. 0.") (graduation, 

 1.30); exposed culmen, O.TS; tarsus, 1.35; middle toe, 0.90. White on 

 inner web of outer tail feather 1.55 in extent along shaft. "Iris pale 

 dirty yellow." 



2. Oreothlypis gutturalis (Cab.). 



A young female may be described as follows: 



You )i(/ female (No. 2110, Museo Nacional de Costa Kica, Achiote, C. 

 K'., July 27,1888; A. Alfaro): Above dull ])lumbeous-gray, with a 

 triangular patch of black on the back, as in the adult: chin, throat, and 

 chest i)alc dingy butf, the feathers grayish, white beneath the surface, 

 their bases deeper grayish ; rest of under j^arls whitish medially, 

 g)-ayisli laterally. 



3. Eiicometis cassini (Lhwt. ). 



Young (No. 33r.O, ^Museo Nacional de Costa Kica, Jimenez, C. li., 



August 10, 1880; A. Alfaro): Much duller in color than the adult, with 



none of the yellowish olive-green on top of the hea«l, which is the same 



color as the back, with a very faint tinge of olive on thcocci])ut ; breast 



ami sides merely tinged with olive-green, the middle line of the breast 



and belly being dull brownish bull, the under tail coverts browner; 



forehead aiul lores less black than in the adult. Otherwise, the general 



coloration is similar to that <ir the adult. 



473 

 Procccdinga N.itional SiiiAeuni, Vol. XIV — No. 809. 



