316 
Mr. O. Salvin's Visit to the 
Empidonax atrxrostris, Lawr. Proc. Ac. Phil. 1871, p. 234. 
The type of this species Mr. Lawrence also kindly allowed 
me to take away with me for comparison. I find it identical 
with our Sublegatus glaher (P. Z. S. 1868, p. 171). 
Margarornis guttata, Lawr. Ann. Lyc. N. Y. viii. p. 128, 
though closely allied to M. brunnescens , Scl., appears to 
be sufficiently distinguishable by having the tail and uropy- 
gium rufous instead of dark brown. Gray, in his f Hand-list' 
(i. p. 180), gives the names of two other species of this genus 
as “ gutturalis , Lafr., Bolivia,” and “ certhoides, Lafr., Ar¬ 
gentine Hep.” I have searched carefully through Lafres- 
naye's writings for the descriptions of these birds, but with¬ 
out success; nor can I find any other mention of them beyond 
what appears in the f Hand-list/ Another valid species of 
this genus is M. stellata, Scl. & Salv. Nomencl. p. 67, et App. 
p. 160, a second specimen of which I saw in the collection of 
the Smithsonian Institution. 
Thamnophilus leucopygus, Lawr. Ann. Lyc. N. Y. viii. 
p. 401. 
On examining the type of this species in Mr. Lawrence's 
collection, I felt convinced that an error had been made in 
assigning the Isthmus of Panama as the origin of the skin. 
I now find that the bird really belongs to the common African 
species, Dryoscopus cubla (Lath.), Sharpe's Cat. Afr. Birds, 
p. 47. In some exchanges I made with McLeannan, I sent 
him a number of African skins; doubtless this one was 
included by mistake in a collection forwarded to Mr. Law¬ 
rence from Panama, and thus misled the latter gentleman as 
to the origin of the specimen. Thamnophilus leucopygus 
must therefore be removed from the list of American birds 
altogether, and the name placed as a synonym of Dryo¬ 
scopus cubla. 
Dysithamnus rufiventris, Lawr. Ann. Lyc. N. Y. viii. 
p. 131 (1865), is described from a’ young male of Cerco- 
macra tyrannina } Scl., the underparts having the immature 
plumage still unmoulted. 
