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



(3537) Planesticus obsoletus colombianus {Hart. & Hellm.). 



Turdus colombianus Hakt. & Hellm., Nov. ZooL, VIII, 1901, p. 492 ("Cali," 

 Colombia). 



A female from San Antonio can be so nearly matched by specimens 

 from eastern Panama that there appears to be no room to doubt the inter- 

 gradation of colombianus with obsoletus. 



San Antonio, I. 



(3538a) Planesticus albiventer ephippialis (ScL). 



Turdus ephippialis Scl., P. Z. S., 1862, p. 109 (Nov. Granada Int.). 



Merula albiventris fusa Bangs, Proc. Biol. Soc. Wash., XIII, 1899, p. 107 

 (Chirua — type locality; La Concepcion; San Miguel; San Francisco); Allen, 

 Bull. A. M. N. H., XIII, 1900, p. 182 (Bonda). 



Fom' specimens from the upper Magdalena are extreme examples of, 

 but not separable from, the Santa Marta form of which we have six speci- 

 mens. This is to be distinguished from true albiventer of Bahia chiefly by 

 the much paler color of the underparts, which in albiventer are strongly 

 washed with brownish, particularly on the breast. This form evidently 

 extends eastward along the Venezuelan coast but specimens from the middle 

 Orinoco are apparently albiventer. 



Honda, 3; Chi coral, 1. 



(3544) Semimerula gigas gigas {Eraser). 



Turdus gigas Fraser, P. Z. S., 1840, p. 59 (BogotA); Wyatt, Ibis, 1871, p. 320 

 (8000-9000 ft.; below Paramo of Pamplona); Scl. & Salv., P. Z. S., 1879, p. 491 

 (Retiro; Sta. Elena). 



Merula gigas Stone, Proc. Acad. N. S. Phila., 1899, p. 312 (Bogota). 



A very common bird in the Temperate Zone of the Eastern Andes 

 descending into the Subtropical Zone, where this zone is arid, to as low as 

 5000 ft. In ascending the trail from Honda to Facatativa this species was 

 first encountered at an elevation of about 6000 feet. It was common on the 

 Bogota Savanna, and along the trail toward Villavicencio was numerous at 

 Chipaque, and occurred in decreased numbers as far down the trail as 

 Quetame. Specimens from throughout this area agree one with the other and 

 are topotypical of gigas. This form has the under wing-coverts tinged with 

 ochraceous and is paler, particularly below, than specimens from the Central 

 and Western Andes and Pichincha, Ecuador, to which the name gigantodes 

 is evidently applicable, and thus marks an approach toward pallidiventris 

 of the Venezuelan Andes, of which, however, I have no specimens. 



