190 Mr. 0. Salvin on the Ornithology of Guatemala. 
Quezaltenango (where Parus, Sitta, and other Mexican high¬ 
land forms are yet to be found), Yucatan (where I feel sure 
much remains to be done, especially amongst the savannas 
of that peculiar district), and southward along our southern 
boundary, which, it will be remembered, was the line of the pro¬ 
posed Honduras Railway. This line I now believe to be per¬ 
fectly arbitrary, as I have little doubt that the Guatemalan 
fauna really extends as far south as the Rio San Juan and the 
southern border of the lake of Nicaragua. Passing south of 
this, we come at once upon the clearly defined and peculiar 
fauna of Costa Rica. But more on this subject on another 
occasion, as space will not allow me now to enter critically upon 
the distribution of ornithic life throughout the isthmus. 
1. Catharus frantzii (Cab.): Baird, Rev. Am. Birds, 
part i. p. 9. 
In November 1861 we obtained a single specimen of this 
species at Duenas. It agrees with other specimens in our col¬ 
lection from Costa Rica, where it was first discovered by Dr. von 
Prantzius. 
2. ClNCLUS MEXICANUS, Sw. ? 
j£ Q A pair of Dippers once only came under my notice. They 
were seen on the rocks of a mountain-torrent above Totonicapam, 
at an elevation of about 10,000 feet above the sea. I shot one, 
but the stream swept it away before I could reach it. 
3. PsALTRIPARUS MELANOTIS, Hartl. 
Originally described from Guatemalan specimens. On more 
than one occasion I observed what I believe to be this species, 
in the pine-woods of the mountains near Solola and above the 
lake of Atitlan. 
4. Polioptila superciliaris, Lawr. 
A single male specimen of this Polioptila was brought to us 
from Chisec. 
5. Certhia mexicana, Gloger : Baird, Rev. Am. Birds, part i. 
p. 90. 
The Mexican Tree-creeper is by no means uncommon in the 
pine-forests of the upper zone of the Volcan de Fuego. We also 
