228 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 93 



The Mexican pipromorphna {Pipromorphna oleaginea assimilis), 

 common on the Sierra de Tuxtla above 1,000 feet elevation, was taken 

 once at Tres Zapotes on January 18, during a storm. Lichtenstein's 

 warbler (Basileuterus culicivorus culicivorus) , another common 

 mountain species, seemed also to be a straggler to the lowlands, where 

 it was taken at Tres Zapotes on January 26 and at Tlacotalpam Febru- 

 ary 7. The Mexican shrike-tanager (Lanio auratius) , common to 2,500 

 feet in the mountains, was found at Tres Zapotes on January 26 and 

 February 28. The brown-headed chlorospingus (Chlorospingus oph- 

 thalmicus ophthalmicus) , which ranged mainly in the higher moun- 

 tain forests, was obtained at Tres Zapotes on January 17. Though it 

 is possible that there were local groups of these species resident in the 

 lowland forests, it appears that there is a certain amount of altitudinal 

 shifting in their search for food and because of cold and storms dur- 

 ing the winter period. Much more study of this subject is required. 



ANNOTATED LIST 



Family TINAMIDAE 



TINAMUS MAJOR PERCAUTUS Van Tyne 



Tinamus major percautus Van Tyne, Univ. Michigan Mus. Zool. Misc. Publ. 27, 

 Aug. 1, 1935, p. 8 (Uaxactun, Peten, Guatemala). 



The two obtained were taken by Carriker. On March 23, 1910, at 

 2,000 feet elevation on the Cerro Tuxtla, he found two fighting furi- 

 ously and shot one, which proved to be a male. Others were heard from 

 time to time on this mountain, but no more were seen. On April 8, 

 in fairly heavy woodland near Hueyapa, between Tres Zapotes and 

 Boca San Miguel, attention was drawn by a rustling sound to one 

 skulking off through the undergrowth. This proved to be a female. 

 The bird appears to be the rarest of the tinamous of the region and is 

 a species known there to very few persons. 



The decidedly gray coloration of the two specimens obtained is evi- 

 dent at a glance, the difference being a striking one when the skins are 

 compared with specimens of T. m. robustus from the Caribbean region 

 of central Guatemala. After examination of four specimens kindly 

 lent me by Dr. J. Van Tyne from the original series from which he 

 described the race percautus, it appears to me evident that the birds 

 from the Tres Zapotes area are to be identified as that form. They 

 agree in more grayish olive color above and in paler coloration below. 

 The only difference that I can find is that the black crossbars on the 

 wings and back in the Veracruz specimens are not quite so heavy, a 

 difference that is very slight and one that I believe is due to individual 

 variation. In his discussion of this new race, Van Tyne noted that 



