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



(191a) Leptotila rufaxilla pallidipectus Chapm. 



Leptotila rufaxilla pallidipectus Chapm., Bull. A. M. N. H., XXXIV, 1915, p. 

 369 (Buena Vista, Col.). 



Char, svhsp. — Differs from all the brown forms of this species in its much paler, 

 buff-tinted (vinaceous-buff) breast, paler light brownish olive back, practically 

 without purplish reflections; more grayish, less iridescent occiput and nape; the 

 gull-gray of crown as restricted as in L. r. dubusi, the throat as extensively white as 

 in hellmayri; agreeing in size with the former. 



Found by us only at and above Villavicencio. Doubtless it extends 

 southward to the northern border of the Amazonian forests along the Gua- 

 viare River, beyond which it is replaced by L. r. duhusi. 



Buena Vista, 1 ; Villavicencio, 2. 



(1916) Leptotila plumbeiceps Scl. & Salv. 

 Leptoptila plumbeiceps Scl. & Salv., P. Z. S., 1868, p. 59 (Vera Paz, Guatemala). 



A not common inhabitant of the Tropical Zone in the Cauca Valley and 

 at Caldas on the western slope of the Western Andes. 



This species, described from Guatemala, appears not to have before been 

 recorded south of Costa Rica, and one might expect specimens from Colom- 

 bia to be subspecifically separable from those representing the species at 

 the northern limits of its range. My unusually satisfactory material in- 

 cludes two specimens from Costa Rica, one from Nicaragua, three from 

 Honduras, one from Central Guatemala, three from Teaba and one from 

 Frontera, Tabasco, Mexico, and two from southern Vera Cruz. The 

 Mexican specimen and the one from the vicinity of Coban, Guatemala, may 

 be considered typically to represent plumbeiceps and from these birds the 

 Cauca specimens differ appreciably in having the bluish gray of the crown 

 and nape more extensive and reaching to the foreback, the auricular region 

 and sides of the throat much paler, vinaceous-buff rather than buff or ochra- 

 ceous-buff, the breast paler, and the under tail-coverts with little if any 

 dusky external margin. 



The Honduras specimens, however, are nearer the Cauca bird, the one 

 from Nicaragua agrees with true plumbeiceps, while those from Costa Rica 

 are somewhat intermediate. To separate the Cauca bird, therefore, would 

 make it difficult to name with any exactness specimens from by far the 

 larger part of the range of the species, to my mind an unwarranted proceed- 

 ing. 



Guengiie, 1; Rio Frio, 1; Las Lomitas, 2; Caldas, 1. 



