BIRDS OF NORTH AND MIDDLE AMERICA. 757 



and upper eyelid pale dull buff or buffy olive; a triangular dusky loral 

 space and a less distinct (sometimes obsolete) dusky postocular spot or 

 streak; under parts pale buff', the abdomen (sometimes throat also) 

 nearly (sometimes quite) white, the sides and flanks buff'y brown, the 

 latter more strongly suffused with buff; chest sometimes indistinctly 

 barred with pale olive; bill brownish black or blackish brown, the 

 mandible sometimes paler brown; iris dark brown;' legs and feet pale 

 horn brown (in dried skins). 



Adult ?nfflfe.— Length (skins), 119.5-12i (122.5); wing, 62-64 (63.1); 

 tail, 50-53.6 (51.3); exposed culmen, 11-13 (11.8); tarsus, 21-23 (22.4).' 



Adult female.— \jQngth. (skins), 119-122 (120.5); wing, 62; tail, 49-50 

 (49.5); exposed culmen, 11-12 (11.6); tarsus, 21-23 (22). ■' 



Isthmus of Panama (south to Panama Railroad) and southwestern 

 Costa Rica (Rio Naranjo; Boruca; Buenos Aires). 



Sasikuierus uropygialis (not of Sclater, 1864) Sclatek and Salvin, Proc. Zool. 

 Soo. Lond., 1864, 347 (Panama R. R.)-— Baird, Review Am. Birds, 1865, 

 246 (Panama R. R.)-— Salvin, Proc. Zool. Soc. Lond., 1867, 136 (Santa Fe, 

 Veragua; crit. ); 1870, 183 (Bugaba, Veragua). 



[Basileuterus] uropj/gfiaKs ScLATEEand Salvin, Nom.Av. Neotr.,1873, 10 (Panama). 



Badleuierus semicermnus (not of Sclater) Lawrence, Ann. Lye. N. Y., vii, 1861, 

 322 (Panama R. R.). 



Basileuterus leucopygius (not of Sclater and Salvin) Salvin and Godman, Biol. 

 Centr.-Am., Aves, i, 1881, 172, part (Bugaba and Santa F6, Veragua; Pan- 

 ama R. R. ). 



[Basileuterus leucopygius. ] Subsp. a. Basileuterus veragueTtAis Shaepe, Cat. Birds 

 Brit. Mus., X, 1885, 403 (Paraiso Station, Panama R. R.; coll. Brit. Mus. ). 



Basileuterus leucopygius reraguensis Bangs, Auk, viii, Oct., 1901, 368 (Divala, 

 Chiriqui); Proc. New Engl. Zool. Club, iii, 1902, 60 (Boquete, Chiriqui, 

 4,000 ft. alt). 



Basileuterus veraguenids Cheeeie, Anal. Inst. Fis.-Geog. Nac. Costa Rica, vi, 1893, 

 12 (Rio Naranjo, s. w. Costa Rica; crit.; habits; song); Expl. Zool. Costa 

 Rica, i, Aves, 1893, 14 (Boruca and Buenos Aires, s. w. Costa Rica). 



BASILEUTERUS SEMICERVINUS LEUCOPYGIUS (Sclater and Salvin). 



COSTA RICAN BUFF-RTJMPED WARBIER. 



Similar to B. s. veraguensis, but buff of tail-coverts and basal portion 

 of tail paler (nearly cream buff), that of the tail more restricted (occu- 

 pying about the basal half, instead of basal two-thirds, and quite hid- 

 den by the coverts); under parts paler, largely white medially, but 

 sides and flanks much darker buffy olive, and the chest (sometimes 

 breast also) spotted with pale olive. 



Adult ma^e.— Length (skins), 132; wing, 63-64 (63.5); tail, 61-52 

 (51.5); exposed culmen, 11.6-12 (11.7); tarsus, 23.6-24 (23.7).* 



Adult feinale.— I^ength (skins), 116-130 (121.7); wing, 60-63 (60.9); 

 tail, 48-50.5 (49.1); exposed culmen, 12-12.5 (12.2); tarsus, 20.5-23.5.' 



1 Heyde, manuscript. ^ Four specimens. '^ Two specimens. 



' Two specimens. ^ Four specimens. 



