BIRDS OF NORTH AND MIDDLE AMERICA. 669 



upper abdomen with broader, more spot-like bars; length (skin), 105; 

 wing, 61; tail, 23; exposed culmen, 18; tarsus, 23; middle toe, W.'^ 

 Eastern Costa Eica (Pacuare, Talamanca). 



Microcerculus luscinia (not of Salvin) Zeledon, Cat. Aves de Oosta Rica, 1882, 3; 



Proc. U. S. Nat. Mus., viii, 1885, 105; Anal. Mus. Nac. Costa Rica, i, 1888, 



105 (Pacuare). 

 Microcerculus daulias Ridgway, Proc. U. S., Nat. Mus., x, sig. 32, Aug. 6, 1888, 



508 (Talamanca, Costa Eica; coll. U. S. Nat. Mus.). — Zeledon, Anal. Mus. 



Nac. Costa Rica, i, 1888, 105. 

 Microcerculus orpheus Ridgway, Proc. U". B. Nat. Mus., xi, aig. 34, Sept. 20, 1889, 



639 (Pacuare,!' Costa Rica; coll. U. S. Nat. Mus.). — Zeledon, Anal. Mus. 



Nac. Costa Rica, i, 1888, 105. 



MICROCERCULUS LUSCINIA Salvin. 

 PANAMA NIGHTINGALE WKEN. 



Similar to If. daulias, but smaller, with under parts darker and much 

 more uniform. 



Adult male. — Above plain deep Vandyke brown (or between van- 

 •dyke and mummy), becoming duller on pileum, where the feathers are 

 usually indistinctly margined with dusky; tail and remiges uniform 

 brownish black or blackish brown, the tertials more or less distinctly 

 edged with vandyke brown; wing-coverts blackish brown or dusky, 

 broadly margined with light vandyke or mummy brown; sides of 

 head, including loral, suborbital, auricular, and malar regions, plain 

 brownish gray; chin and upper throat very pale plain brownish gray 

 or dull grayish white; lower throat more decidedly gray, deepening 

 on chest, breast, and upper abdomen into brownish mouse gray, the 

 feathers more or less distinctly margined with brown, sometimes very 

 faintly mottled or barred with brown or deeper gray; sides, flanks, 

 thighs, under tail-coverts, and lower abdomen plain deep vandyke or 

 mummy brown; bill black, the under side of mandible (except termi- 

 nally) pale colored; legs and feet black or blackish brown; length 

 (skins), 101-106.5 (103.5); wing, 58.5-59.5 (59.1); tail, 23.5-24.5 (24); 

 exposed culmen, 17-18 (17.5); tarsus, 22.5-24.5 (23.5); middle toe, 

 14.5-15 (14.7)." 



Adult female. — Similar to the adult male, and perhaps not alwa3'S 

 distinguishable, but the single specimen examined is more strongly 

 suffused with brown on the chest, breast, and upper abdomen, where 

 the gi'ay is largely overlaid with a superficial wash of mummy brown; 



oOne specimen (type of M. daulias), from Talamanca, eastern Costa Rica; Jos6 C. 

 Zeledon. (No. 68287, coll. U. S. Nat. Mus.) 



b Probably from some point on the Pacuare River, which is on the Atlantic side. 

 In the original descriptioa the locality was erroneously ascribed to the Pacific side. 



c Three specimens. 



