THRYOPHILUS. 83 
In Guatemala this Wren is a common bird, as we found it abundant at all seasons in 
the neighbourhood of Duefias and even as high as Calderas in the Volcan de Fuego, at 
an altitude of over 7000 feet. It is also found equally abundant in the low-lying 
country bordering the Pacific, in the neighbourhood of towns and villages, at as low an 
elevation as 1000 feet above the sea. Specimens obtained on the line of the Panama 
Railway were found at a much lower elevation than this. 
Its place of resort is usually moderately thick forest, choosing trees of dense matted 
erowth rather than thickly grown underwood. Its song is powerful and melodious, 
but with no great variation. 
2. Thryophilus sinaloa. 
Thryophilus sinaloa, Baird, Rev. Am. B. i. p. 180°; Lawr. Mem. Bost. Soc. N. H. ii. p. 2687. 
T. rufalbo affinis, sed multo minor, corpore supra fuscescentiore et hypochondriis brunnescentioribus differt. 
Long. tota 5:2, ale 2°2, caude 2:0, rostri a rictu 0°8, tarsi0°9. (Descr. maris ex Mazatlan, Mexico [Smiths. 
Inst. no. 34016]. Mus. nostr.) 
Hab. Mexico, Mazatlan (Grayson!?, Xantus +), Sinaloa (Grayson ?), Colima (Xantus 1). 
This species may be considered to represent Thryophilus rufalbus in Mexico, where, 
however, it has a limited range, which does not appear to'.pass beyond the western 
coast of that country. Here its presence was detected by the two naturalists Grayson 
and Xantus, to whose exertions our knowledge of the ornithology of Western Mexico 
is almost entirely due. The following short note by the former traveller is the only 
account we have of the bird :—‘ This little Wren is common from Sinaloa to Tehuan- 
tepec. Its nest is usually built in the drooping branches of a thorn tree, thus giving 
the abode of the young some protection against the innumerable ants and other insects 
that would otherwise infest it. Most of its congeners build their nests in hollow logs, 
among roots of trees, &c. ‘The nest is partly suspended from the branches, and built 
of fine grass. The eggs are usually five in number, and marked with small specks of 
a brownish colour.” 
b’. Crissum immaculatum. 
3. Thryophilus modestus. 
Thryothorus modestus, Cab. J. f. Orn. 1860, p. 409*; Lawr. Ann. Lyc. N. Y. viii. p. 5°; Sel. 
& Salv. P. Z. S. 1864, p. 346°, 1870, p. 836%; Salv. Ibis, 1866, p. 205°; P. Z. 8. 1870, 
p. 181°. 
Thryophilus modestus, Baird, Rev. Am. B, i. p. 181’; Lawr. Ann. Lyc. N. Y. ix. p. 92°; v. Frantzius, 
J. £. Orn. 1869, p. 291’. 
Thryothorus felix ?, Salv. & Scl. Ibis, 1860, p. 397° (nec Sclater). 
Thryothorus leucotis, Lawr. Ann. Lyc. N. Y. vii. p. 8320" (nec Lafr.). 
Thryothorus albipectus, Scl. Cat. Am. B. p. 20, partim”* (nec Cabanis), 
11* 
