1917.] Chapinan, Distribution of Bird-life in Colombia. 439 



grayness of its breast and obsoletely streaked throat, approaches T. s. 

 griseoluin Todd (Proc. Biol. Soc. Wash., 1913, 170, El Hacha, n. Venezuela). 

 The last-named form, as it is represented by four specimens including the 

 type, loaned me by Mr. Todd, is very near superciliare, but has a smaller 

 bill and averages darker above and grayer on the breast and throat. 



From true schistaceiceps, of Central America, superciliare differs in hav- 

 ing less yellow on the flanks and particularly abdomen, the latter being in 

 some specimens with scarcely a tinge of yellow. 



The differences between topotypical specimens of the three races of 

 this species are so slight that the satisfactory identification of specimens 

 from other localities is attended with some difficulty, nevertheless all our 

 remaining nine Colombian specimens were taken as far apart as Los Cis- 

 neros on the western slope of the Western Andes to Villavicencio at the 

 eastern base of the Eastern Andes appear to be referable to I. s. superciliare. 

 A female from the last-named locality is somewhat darker above than typi- 

 cal birds but has the throat and belly as white, the breast as pale as any 

 bird in the series. 



Los Cisneros, 1 ; La Manuelita, 1 ; Rio Frio, 1; Puerto Berrio, 2; Honda, 

 2; Chicoral, 1; Villavicencio, 1. 



(2793) Todirostrum latirostre (Pelz.). 



Euscarthmus latirostris Pelz., Orn. Bras., 1869, p. 173 (Borba, Brazil). 



Two males from Florencia appear to represent this species of which, 

 however, I have seen no authentic specimens. 

 Florencia, 2. 



(2794) Poecilotriccus ruficeps ruficeps (Kaup). 



Todirostrum ruficeps Kaup, P. Z. S., 1851, p. 52 (" Mexico "= Colombia); Sol. & 

 Salv., p. Z. S., 1879, p. 512 (Frontino). 



Our specimens are all from the Subtropical Zone of the Central Andes. 

 Specimens from the more southern part of this range in Colombia and from 

 the Western Andes are referable to P. ruficeps ruflgene. 



Salento, 3; Sta. Elena, 1; Rio Toche, 1; El Eden, 6. 



(2795) Poecilotriccus ruficeps rufigene (Scl. & Salv.). 



Todirostrum rufigene Sol. & Salv., P. Z. S., 1877, p. 522 (Mongi, Ecuador). 



Specimens from the Subtropical Zone in the southern part of the West- 

 ern and Central Andes are referable to this form, though when compared 



