. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Biology and Evolution of Atlapetes • Paynter 341 maining four races, whicli lie to the west, have the former pattern. The two color pat- terns correspond to the two zoogeographical subdivisions of the "pantepui" region which lie on either side of the Rio Cavn'a (Mayr and Phelps, 1967). Variation within these two groupings is in the extent of the chest- nut color or in the general intensity or shade of the colors. No significant differences in size have been noted. Atlapetes fulviceps Range.—This little-known
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Biology and Evolution of Atlapetes • Paynter 341 maining four races, whicli lie to the west, have the former pattern. The two color pat- terns correspond to the two zoogeographical subdivisions of the "pantepui" region which lie on either side of the Rio Cavn'a (Mayr and Phelps, 1967). Variation within these two groupings is in the extent of the chest- nut color or in the general intensity or shade of the colors. No significant differences in size have been noted. Atlapetes fulviceps Range.—This little-known s]3ecies has been recorded from the eastern slopes of Bolivia (La Paz to Chuquisaca) and in nt)rthwestern Argentina, apparently from about 400 m to as high as 2,700 m (Fig. 14). Hellmayr (1938) states that this is a form of the subtropical zone, bvit if the altitudinal range is as wide as the collecting records seem to indicate, the species must reach the temperate, or at least subtemperate, zone. Apparently this is a very rare bird in Argentina. Ha])itat and habits.—Nothing recorded. Morphological variation.—No geographi- cal variation in morphology has been de- tected. Atlapetes citrlnellus Range.—The species, which is the south- ernmost representative of the genus, is re- stricted to the subtropical slopes of the Andes in Salta, Jujuy, and Tucuman, north- western Argentina, from about 1,000 to 3,100 m (Fig. 15). I can find no substantia- tion for Olrog's (1963) inclusion of Cata- marca within the range. There is one sus- pect record from northern Paraguay (Ber- toni, 1924). Ha/;jfaf.—Dinelli (1918) reported that the species occurs in dense ferns in shady, humid ravines; Wetmore (1926) found it in thick weeds at the edge of a grove. Hfl/;—Dinelli (1918) noted this bird on the ground in small groups and reported it is not timid and is readily lured into sight when its call is imitated (described as a faint "; by ^^'etmol•e, 1926). This is a
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