1917.] Chapman, Distribution of Bird-life in Colombia. 421 



Inhabits the Tropical Zone of the Pacific coast. After comparison of 

 our Colombian series with four Panama specimens of lachrymosus, includ- 

 ing the type, I find no ground for the separation of a west Colombian form. 



Baudo, 1; Novita, 1; N6vita Trail (2000 ft.), 1; Noanami, 2; Dabeiba, 

 2; Alto Bonito, 5; San Jose, 1; Barbacoas, 4. 



Table of Measurements. 



Sex Wing Tail Calmen 



(2544a) Xiphorhynchus lachrymosus alarum Chapm. 



Xiphorhynchus lachrymosus alarum Chapm., Bull. A. M. N. H., Vol. XXXIV, 

 1915, p. 642 (Puerto Valdivia, CoL). 



Char, subsp. — Similar to X. I. lachrymosus (Lawr.), but buffy guttate spots 

 on the back smaller and narrowly margined with black and more widely with Dresden- 

 brown rather than broadly margined with black; spots below averaging smaller; 

 lesser wing-coverts with much less black, the outer greater coverts margined exter- 

 nally with brownish above instead of black. 



Inhabits the Tropical Zone of the lower Cauca River and doubtless 

 also the adjoining areas on the Magdalena Valley. 

 Puerto Valdivia, 12. 



(2545a) Xiphorhynchus nanus nanus (Lawr.). 



Dendrornis nana Lawr., Ibis, 1863, p. 181 (Lion Hill, Panama; type examined); 

 Allen, BuU. A. M.N. H., XIII, 1900, p. 157 (CacaguaUto) . 



Inhabits the Tropical Zone in the Atrato, Cauca, and Magdalena Val- 

 leys. Specimens from the Magdalena Valley average paler than those from 

 Rio Frio and the Atrato, but the difference is fully covered by a series of 

 specimens from the Panama Canal Zone, including the type. 



Atrato River, 2; Rio Frio, 4; Manuelita, 1; Puerto Berrio, 2; Opon, 1; 

 Honda, 1. 



