1917.] Chapman, Distribution of Bird-life in Colombia. 413 



and intensity of coloration, virgaticeps being larger and with the back and 

 underparts more suffused with rufous. In pattern of coloration, that is, 

 width of shaft-streaks, markings of throat, etc., the two forms are exactly 

 alike. 



Lawrence's type is a trade skin labelled "Quito" and hence may have 

 come from the Subtropical Zone of either the eastern or western slope of 

 the Ecuadorian Andes. A specimen collected by Richardson at Ricaurte 

 (5000 ft.) in extreme southwestern Colombia suggests that the latter slope 

 may be the true type-locality. It is nearer to virgaticeps than to sdateri 

 in size, agrees with the latter in the color of the upperparts, but below is 

 less richly colored than either of the other two. Nevertheless, I am in- 

 clined to the belief that it is an actual intermediate between them. I 

 append measurements of all the specimens in our collection, including two 

 of Thripadectes rufobrunneus (Lawr.) which appears to be a northern repre- 

 sentative of the group. 



(2481) Ancistrops strigilatus (Spix). 



Thamnophilus strigilatus Spix, Av. Bras., 1825, p. 26, pi. xxxvi, fig. 1 (e. Peru). 



A single specimen from La Moreha adds this species to the recorded 

 fauna of Colombia. 

 La Morelia, 1. 



(2487) Xenicopsis subalaris subalaris {Scl.). 



Anahates subalaris Scr.., P. Z. S., 1859, p. 141 (Pallatanga, Ecuador). 



Xenicopsis subalaris subalaris Hbllm., P. Z. S., 1911, p. 1151 (Loma Hermosa, 

 W. Andes). 



Xenicopsis subalaris columbianus Chapm., Bull. A. M. N. H., XXXI, 1912, p. 150 

 (Miraflores, Cen. Andes). 



Inhabits the Subtropical Zone of the western Andes and western slope 

 of the Central Andes. The receipt of additional material from southern 

 Ecuador (six specimens from Zaruma) shows beyond question that my pro- 



