1917.] Chapman, Distribution of Bird-life in Colombia. 473 



(3066) Empidonax virescens ( Vieill.). 



Platyrhynchus virescens Vieill., Nouv. Diet. d'Hi.st. Nat., XXVII, 1818, p. 22 

 (near Philadelphia, Pa.). 



Empidonax virescens 'H.TiiAjU.,'P.Z.S.,lQll, p. 113Q (Pueblo Rico; Sipi); Allen, 

 Bull. A. M. N. H., XIII, 1900, p. 143 (Bonda; Valparaiso). 



Taken only west of the Central Andes. December specimens are much 

 yellower below than those taken in February and March. 



Juntas de Tamand, 2, Dec. 18, 20; Los Cisneros, 1, Mch. 20; Las 

 Lomitas, 3, Feb. 27-Mch. 6; San Antonio, 2, Feb. 16, 21; Rio Frio, 1, 

 Nov. 24; Puerto Valdivia, 1, Dec. 14. 



(3064a) Empidonax trailli alnorum Brewst. 

 Empidonax traillii alnorum Bbewst., Auk, XII, 1895, p. 161 (Upton, Me.). 



Found only in the Tropical Zone. Two of our specimens might as 

 readily be referred to trailli as to alnorum, and few represent the extreme 

 type of alnorum, but the series as a whole is nearer to alnorum than to trailli. 



Dabeiba, 1, Feb. 26; Turbaco, 1, Aug. 15; Calamar, 2, Nov. 4, Jan. 21; 

 Puerto Berrio, 1, Jan. 29; Honda, 3, Feb. 6-8. 



(3069) Myiochanes ardosiacus ardosiacus (Lafr.). 



Tyrannula ardosiaca Lafb., Rev. ZooL, 1844, p. 80 (Colombia). 



Contopus ardesiacus Scl. & Salv., P. Z. S., 1879, p. 515 (Medellin; Sta. Elena). 



Inhabits the Subtropical Zone of all three ranges. I can detect no 

 racial differences. 



Paramillo Trail (10,000 ft.), 1; San Antonio, 2; Cerro Munchique, 1; 

 Gallera, 1; Ricaurte, 2; Buena vista, Nariiio, 1; Salento, 1; Rio Toche, 1; 

 La Palma, 1; near San Agustin, 2; La Candela, 2; Fusugasuga, 4; Agua- 

 dita, 3; El Roble, 1; Palo Hueco, 1. 



(3071) Myiochanes virens (Linn.). 



Muscicapa virens Linn., Syst. Nat., I, 1766, p. 327 (Carolina). 

 Contopus virens Allen, Bull. A. M. N. H., XIII, 1900, p. 142 (Valparaiso; 

 CacaguaUto; Santa Marta). 



A specimen taken at Dabeiba, one at San Agustin, May 4 (a surprisingly 

 late date), and two from Villavicencio are typical of this species. 



We have also a specimen from La Frijolera, Jan. 3, one from Salencio 



