Aa 
262 
merely to differences in seasonal plumage. I have pointed out in the description of the species 
given below, that the winter plumage is much more russet than the breeding-plumage, which is 
greyer and more olive. As Messrs. Salvin and Godman have shown in the * Biologia,' the greyer birds 
are found with others of the normal colour; but when reliable dates of capture are attached to the 
specimens, it will be found that the greyer individuals are in spring or summer plumage, while the 
more rufous ones have been killed in the winter months. The reluctance of collectors to preserve 
the ragged and moulting specimens of the autumn months has resulted in the regrettable fact that 
in all the large series in the Museum we have not a single bird which shows the moult from the 
worn grey summer plumage to the russet dress of winter. | 
Gray's Thrush will probably be found to be а species which visits the more elevated regions for 
nesting-purposes, spreading over the lower districts in the winter. Тһе late Colonel Grayson says 
that it was gregarious and partially migratory in the district of Теріс which he visited (Proc. Bost. 
Soc. N. Н. xiv. p. 276). Messrs. Salvin and Godman found it breeding in abundance in Guatemala 
up to an elevation of between 4500 and 6000 feet (Biol. Centr.-Amer., Aves, i. p. 19). In Chiapas 
Mr. W. B. Richardson has procured specimens from March to June at an elevation of 4000 feet, and 
Mrs. Herbert Smith at Omilteme in Guerrero at 8000 feet. 
The distribution of the species in Mexico is well illustrated by the series of specimens in the 
Salvin-Godman Collection, as will be seen from the localities enumerated below. 
Тһе Mexican localities for the species in the British Museum are as follows :—San Ignacio, 
Nuevo Leon, May 29, 1888 (Р. В. Armstrong : Salvin-Godman Coll.) ; Tampico, Feb. 1888 (W. B. 
Richardson: S.-G. Coll.) ; Aldama, Tamaulipas, March 1888 (W. В. R.: S.-G. Coll.); Sierra Madre 
above Ciudad Vittoria, Tamaulipas, April 1888 (W. B. R.: S.-G. Coll.); Valles, San Luis Potosi, 
May 1888 (W. В. R.: 8.-6. Coll.) ; City of Mexico (6. H. White: Seebohm Coll.) ; Playa Vicente, 
Vera Cruz, Dec. 1888 (М. Trujillo: S.-G. Coll.) ; Huatusco, Vera Cruz, July 1888 (Е. Ferrari-Perez: 
S.-G. Сой.); Plan del Rio, Jalapa, July 1888 (Е. Ferrari-Perez : S.-G. Coll.); Jalapa, Jan., March 
1888 (Р. D. Godman: S.-G. Сой.); Orizaba, Dec. 1887 (F. D. Godman: S.-G. Coll.); Misantla, 
March 1888 (F. D. Godman: 8.-6. Coll.) ; Coatepec, Vera Cruz, Oct. 1889 (M. Trujillo: S.-G. Coll.) ; 
Atoyac, Vera Cruz, April (Mrs. Herbert Smith: 8.G. Coll; Villa Alta, Oaxaca, March 1889 
(М. Trujillo: S.-G. Coll.); Tehuantepec, July 1877 (Е. Sumichrast : Seebohm Coll.) ; Chimalapa, 
Tehuantepec, 4000 feet, March 31, 1890 (ЈУ. B. Richardson: S.G. Coll.); Sierra бап Domingo, 
Tehuantepec, April 15, 1890 (W. В. Richardson: S.-G. Coll.) ; Omilteme, Guerrero (8000 feet), 
Ang. 1888 (Mrs. Herbert Smith: S.-G. Coll.); Teapa, Jan., Feb. 1888 (Mrs. Herbert Smith: 8.-G. 
Coll.); Tuxtla, Chiapas, March 3-17 (W. B. Richardson: S.-G. Coll.); Union Juarez, Chiapas 
(4000 feet), March 24 (W. В. Richardson: 8.-G. Coll.) ; Huehuetan, Chiapas, April 1897 (W. B. k.: 
S.-G. Coll.) ; Jitotol, 4000 feet, May 6, 1897 (W. В. R.: 8.-6. Coll.) ; Santa Rita, Chiapas, May 8, 
1897 (W. В: R.: 8.-6. Coll.) ; Comitan, Chiapas, May 18, 1897 (W. В. R.: 8.-G. Coll.) ; Tonala, 
Chiapas, June 2, 1896 ( W. В. R.: S.-G. Coll.). 
Besides the above-named Mexican localities for the species there are other records, as set forth 
in the “Biologia Centrali-Americana' by Messrs. Salvin and Godman. Specimens were sent by Sallé 
from Cordova (Scl. P. Z. S. 1856, p. 294, s. n. 7. tristis), and from Choapam and Villa Alta by 
Boucard (Scl. P. 7. S. 1859, p. 370). Baird has recorded specimens from Mirador procured by 
Sartorius (Review Am. B. p. 26), and Sumichrast says that it was the most abundant of all the 
Mexican Thrushes in the State of Vera Cruz, where it is a resident species in the hot and temperate 
regions, but does not pass above an elevation of 4300 feet (Mem. Bost. Soc. N. H. i. p. 543). On 
the Isthmus of Tehuantepec, he says, *I have only observed this bird at Santa Efigenia, where 
it is not very abundant, and where its presence is probably explained by the neighbourhood 
