82 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 74 



spicuous superciliaries white; lores and sides of the head bhick; 

 upper parts brownish olive, the wings and tail externally similar 

 but lighter in color, more buffy olive ; throat pale buffy whitish, more 

 or less mottled with blackish towards the chin; rest of under parts 

 pale buffy, most decided posteriorly, the breast and sides more or 

 less shaded with deep grayish olive, passing into ecru olive on the 

 flanks ; under wing-coverts buffy white ; " iris hazel ; feet dusky flesh- 

 color ; bill brownish black above, flesh-color below." 



Juvenal plumage : Above rich brown (between Prout's brown and 

 mummy brown); faint superciliaries paler, more buffy; wings and 

 tail externally dull olivaceous, the middle and greater wing-coverts 

 tipped with rusty buff ; below buckthorn brown, the belly buffy medi- 

 ally, the throat more grayish. 



Measurements. — Male: Wing, 61-67 (average, 65); tail, 58-64 

 (61.5) ; bill, 10-11 (10.5) ; tarsus, 22-23.5 (23). Female : Wing, 58-64 ; 

 (60) ; tail, 55-62 (58.5) ; bill, 9.5-11 (10.3) : tarsus, 21-23 (22). 



Range. — Highlands of Costa Rica. 



Remarks. — This species belongs to an isolated group, which is 

 possibly distantly related to B. belli, and has a somewhat analogous 

 altituclinal range, which according to Mr. Carriker extends " from 

 about 6,000 feet nearly if not quite up to timber-line on the high 

 volcanoes." It is an inhabitant of the low trees and underbrush of 

 the heavy forest of these parts, and is somewhat wrenlike in its 

 habits. 



Baird's appropriate name for the species has fortunately escaped 

 synonyms. Mr. Carriker thinks that his type specimen could not 

 possibly have come from San Jose, but from some higher elevation. 



Specimens examined. — Costa Rica : La Estrella de Cartago, 5 ; Que- 

 bradilla de Azahar, 3; Azahar de Cartago, 8; " San Jose," 2 (includ- 

 ing type) ; El Roble, Volcano Irazu, 1; Volcano Irazii, 26; Las Vuel- 

 las, 2; Volcano Turrialba, 7; Coliblanco, 2; Lagunaria, Santa Maria 

 de Dota, 2; El Copey, 2; La Palma, 1; Alto, Poas, 1; Ujuras de 

 Terraba, 8; unspecified, 3. Total, 73. 



BASILEUTERUS BELLI BELLI (Giraud) 



Muscicapa ielli Giraud, Sixteen Species Texas Birds, 1841, pi. 4, fig. 2 and 

 text ("Texas"; orig. descr. ; type in coll. U. S. Nat. Mus.). 



Basileutenis chrysophrys Bonaparte, Cousp. Avium, vol. 1, 1850, p. -314 

 Real Ariba, Mexico; orig. descr.; type in coll. Berlin Mus.). — Sclater, 

 Proc. Zool. Soc. London, 1857, p. 202 (Jalapa, Vera Cruz; descr.). 



BaMleuterws ielU Sclater, Proc. Zool, Soc. London, 1855, p. 65 (syu. ; 

 crit.).— Baird, Rept. Pacific R. R. Survey, vol. 9, 1858, p. 305 (refs.).— 

 ScLATEB, Proc. Zool. Soc. London, 1859, p. 374 (Llano Verde and Totou- 

 tepec, Oaxaca; refs.). — Baird, Rev. Anier. Birds, 1865, p. 248 (diag.), 

 p. 250, part (Orizaba, Vera Cniz; descr.; refs.). — Sumichrast, Mem. 

 Bost<m Soc. Nat. Hist., vol. 1, 1869, p. 546 (Temperate Region, Vera 

 Cruz). — Baied, Brewer, and Ridgway, Hist. N. Amer. Birds, vol. 1, 



