384 Bulletin American Museum of Natural History. [Vol. XXXVI, 



Rio Salaqui, 2; Alto Bonito, 9; Dabeiba, 1; Puerto Valdivia, 7; Ma- 

 lena, 1. 



(20916) Myrmeciza immaculatus immaculatus (Lafr.). 

 T[hamnophilus] immaculatus Lafb., Rev. Zool., 1845, p. 340, (Bogota). 



Found by us in the Tropical Zone of the Magdalena Valley, at Mira- 

 flores, above Palmira in the Central Andes and at La Frijolera on the 

 lower Cauca. Two females from the last-named locality are typical of 

 immaculatus while three males from Alto Bonito on the western slope of 

 the same range are referable to berlepscM. It may be distinguished from 

 the Pacific coast race (ilf . i. berlepscM) by the comparatively small amount 

 of white in the lesser wing-coverts of both sexes and by the duller, grayer 

 underparts of the females. 



La Frijolera, 2; Miraflores, 1 ad. $ ; Fusugasuga, 1; Honda, 3; El 

 Consuelo (above Honda, 3200 ft.), 3. 



(2091c) Myrmeciza immaculatus berlepschi Ridgw. 



Myrmeciza berlepschi Ridgw., Proc. Biol. Soc. Wash., XXII, 1909, p. 74 (Chimbo, 

 w. Ecuador); Bangs, Ibid. 1910, p. 73 (Palmar; Paras; La Maria, Col.) 



Myrmelastes immaculatus immaculatus Hellm., P. Z. S., 1911, p. 1168 (Pueblo 

 Rico; Primavera). 



Comparison of fourteen males, and eleven females from the Pacific 

 Tropical Zone of Colombia with four males and seven females from western 

 Ecuador (Rio d'Oro, Naranjo, Santa Rosa) shows that birds from western 

 Colombia and western Ecuador agree. From true immaculatus they may 

 be distinguished by the larger amount of white in the lesser coverts and by 

 the deeper, more richly colored underparts of the female. M. i. zeledoni of 

 Costa Rica, of which I have only a pair of adults, appears to agree with 

 immaculatus in the amount of white in the lesser coverts, but in the colora- 

 tion of the underparts of the female, it resembles berlepschi. 



Alto Bonito, 3; Bagado, 1; Baudo, 2; Novita, 5; Novita Trail (3500 

 ft.), 1; Salencio, 1; San Jose, 5; Las Lomitas, 1; Barbacoas, 6; Buena- 

 vista, Nariiio, 1. 



(2107) Myrmeciza longipes boucardi Berl. 



Myrmeciza boucardi Bebl., Ibis, 1888, p. 129 (Bogotd). 



This race appears to be restricted to the Tropical Zone of the upper 

 Magdalena Valley. The males have the crown and nape with little or no 



