136 FIELD MUSEUM OF NATURAL HISTORY ORNITHOLOGY, VOL. I. 



was near the end of a spring moult involving nearly all the body 

 plumage. Iris dark brown. 



296. Polioptila albiloris Sclater & Salvin. 



White-lored gnat-catchers were common at El Rancho, where five 

 were collected. One was also taken at Gualan. They were found 

 among the leafless hillside shrubbery, usually in pairs. Iris dark 

 brown. 



Family Turdidse. 



297. Hylocichla ustulata Nuttall. 



One was taken at Los Amates January 3ist, four at Mazatenango 

 March i6th 2oth, and six at Patulul March 3ist April 3d. This 

 species was abundant in the last two localities and appeared to be 

 migrating. The one collected at Los Amates was the only one seen 

 on the east side of the divide. None were moulting. Iris dark brown. 



298. Hylocichla guttata auduboni (Baird). 



One specimen was collected near Tecpam, January ist, by Mr. 

 Barber. 



299. Planesticus grayi Bonaparte, and 



300. Planesticus grayi tamaulipensis Nelson. 



Fourteen specimens: Los Amates three; El Rancho four; Lake 

 Amatitlan one; Lake Atitlan three; San Jos< one; Mazatenango 

 two. Three of those from El Rancho are indistinguishable from] 

 examples of P. g. tamaulipensis taken near Tampico. All of the 

 others are darker beneath. The type of grayi came from Guatemala, 

 probably from the Pacific coast region, inasmuch as Colonel Velasquez 

 de Leon, who made the collection reviewed by Bonaparte in the 

 Proceedings of the Zoological Society for 1837 (pp. 114-119), where | 

 grayi was first described, was in the country but a fortnight, and 

 several of his birds are restricted to that region. 



As to the distribution of the pale and dark forms: the pale one, 

 tamaulipensis, originally described by Nelson* from Tamaulipas, and 

 later extended by Hellmayer** to Yucatan and the islands Cozumel, 

 Mugeres and Meco, evidently occurs in the dry tierra templada region 



*Auk, 1897, p. 75. 

 **J. f. O. 1902, p. 50. 



