. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. CENTIMETERS FIGURE 7. Al/apefes r. rufigenii. Yanac (3,700 m), Ancash, Peru, i . MCZ 179,163. like A. nationi scehohmi or A. n. simonsi, except that the black on the sides of the head is either absent or reduced and re- placed by the chestnut of the crown (Fig. 7). In nominate nififienis the lores are either white or gray and the supraloral region is buffy white. In some instances the pale supraloral areas almost meet above the bill. The sides of the head are concolor with the crown, except that in one of seven specim
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. CENTIMETERS FIGURE 7. Al/apefes r. rufigenii. Yanac (3,700 m), Ancash, Peru, i . MCZ 179,163. like A. nationi scehohmi or A. n. simonsi, except that the black on the sides of the head is either absent or reduced and re- placed by the chestnut of the crown (Fig. 7). In nominate nififienis the lores are either white or gray and the supraloral region is buffy white. In some instances the pale supraloral areas almost meet above the bill. The sides of the head are concolor with the crown, except that in one of seven specimens examined there is an indistinct black eye ring and a few small black feathers in the auricular region. The outer edge of the outermost primary is a pale dirtv grav which, while evident, does not sharply contrast with the rest of the wing, as it does, for example, in A. n. . The chestnut of the head is very similar to that in A. n. , while the color of the back, wings, and tail is nearly identical with that of A. n. seehohmi. Ventrally it most nearly resembles A. n. simonsi, which has a less distinct breast band than does A. n. seehohmi, but it differs from both taxa in having almost no trace of a buffy \^'ash on the abdomen and crissum. The mystacal streaks are dark gray and are less prominent than in either simonsi or see- hohmi. I have not examined specimens of A. r. forhesi, the isolated southern form, but from the original description (Morrison, 1947) and the comments of Bond (1951) it is evident that its most noteworthy char- acter is the presence of black on the fore- head and in the circumocular area, which must make this race fairly similar to the northern forms of A. notioni. Atlapefes albiceps Range. The species is known from the western slopes of the Andes of southern Ecuador and northern Peru. There are records (Chapman, 1926, and specimens in MCZ and Basel Museum) from Paletillas, the Casanga Valley, and El Empalme in the southeastern part of t
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