. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 342 Bulletin Museum of Comparative Zoology, Vol. 148, No. 7. brunneinucha • apertus O suttoni © macrou ru s 3 alleni « elsae ® Figure 16. Northern races of A. brunneinucha. At the northern end of its range, the spe- cies occurs as low as 200 m (nominate brunneinucha of eastern Mexico) and 350 m (A. h. apertus of the Sierra de Tuxtla, southern Veracruz) but on the other hand in the same area it also reaches an extreme altitude of 3,500 m (A. /;. suttoni of Guer- rero and Oaxaca). This is doubtless the maximum altitudin
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 342 Bulletin Museum of Comparative Zoology, Vol. 148, No. 7. brunneinucha • apertus O suttoni © macrou ru s 3 alleni « elsae ® Figure 16. Northern races of A. brunneinucha. At the northern end of its range, the spe- cies occurs as low as 200 m (nominate brunneinucha of eastern Mexico) and 350 m (A. h. apertus of the Sierra de Tuxtla, southern Veracruz) but on the other hand in the same area it also reaches an extreme altitude of 3,500 m (A. /;. suttoni of Guer- rero and Oaxaca). This is doubtless the maximum altitudinal range for any species of atlapetes within a reasonably circumscribed area. In Central America, the species ranges from 550 to 3,400 m and in South America from 900 to 3,400 m. Throughout, however, it seems most abundant between roughly 1,000 and 2,000 m. Because of the abundance of moist sub- tropical forest, the species is widely dis- tributed with few major discontinuities. As with birds of similar requirements, the species is absent in most of Panama, but it occurs throughout the Andes south to northern Peru where, owing to the absence of moist forests, it drops out on the western slope but continues southward on the east- ern side. In the coastal range of northern Vene- zuela there is an interesting transposition of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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