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



(2922) Camptostoma pusillum pusillum {Cab. & Hein.). 



Mlyiovatis} pusUla Cab. & Hein., Mus. Hein. II, 1859, p. 58 (Cartagena). 

 Omithion pusillum Allen, BuU. A. M. N. H., XIII, 1900, p. 148 (Bonda; Santa 

 Marta). 



A Tropical Zone species which in one form or another occurs through- 

 out Tropical Colombia, except on the Pacific coast. Specimens from Banco 

 and Algodonal in the lower Magdalena Valley are typical, but one from 

 Chicoral, in the upper Magdalena Valley, is darker above than any of the 

 eight Santa Marta examples which doubtless typically represent this form, 

 and it thus closely approaches C. o. napmum. A much worn example from 

 the Atrato River (exact locality, not stated) appears to be fairly typical of 

 pusillum but has the crown somewhat darker. 



R. Atrato, 1; Banco, 1; Carpintero, 1; Algodonal, 1; Chicoral, 1. 



(2923) Camptostoma pusillum napseum (Ridgw.). 



Omithion naposum Ridg., Proc. TJ. S. N. M., 1887, p. 520 (Diamantina, near 

 Santarem,. Brazil). 



A specimen from Villavicencio is darker than true pusillum and resem- 

 bles specimens from the Orinoco region and Trinidad. 

 Villavicencio, 1. 



(2923a) Camptostoma caucse Chapm. 



Camptostoma causes Chapm., Bull. A. M. N. H., XXXIII, 1914, p. 178 (Rio Frio, 

 Cauca Valley, Col.) , 



Char. sp. — Most nearly resembling C. pusillum, but darker above and paler 

 below, .the crown with a sooty cap clearly defined from the grayish olive back; the 

 throat and breast gray, quite unlike the sulphur-yeUow belly. 



Known only from the Tropical Zone in the Cauca Valley. 

 Rio Frio, 2; Miraflores, 2. 



(2926a) Microtriccus brunneicapillus brunneicapillus {Lawr.). 



Tyrannulus brunneicapillus Lawr., Ibis, 1862, p. 12 (Panama R. R. Line). 



This apparently uncommon bird inhabits the Tropical Zone of the Pa- 

 cific coast and eastward through Antioquia to the Magdalena Valley. 

 Pacific coast specimens are brighter than the type and cotype from Pan- 

 ama, while a specimen from Puerto Berrio on the Magdalena is slightly 



