Vol. 32, pp. 253-268 December 31, 1919 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON DESCRIPTIONS OF PROPOSED NEW BIRDS FROM PERU, BOLIVIA, BRAZIL, AND COLOMBIA.' BY FRANK M. CHAPMAN. Continued study 2 of the birds collected by the Yale Univer-sity-National Geographic Expedition to the Urubamba region of Peru, and, incidentally, of other collections received by the American Museum from South America, has led to the conclu-sions presented in the following pages. The color terms em-ployed are those of Ridgway's "Color Standards and Color No-menclature" (Washington, 1912). I acknowledge, gratefully, the loan of specimens for compari-son from the Museum of Comparative Zoology, through the courtesy of Mr. Outram Bangs. Micropus peruvianus, new species. Specific characters. — Resembling Micropus andecolus (Lafr. & d'Orb.), but tail shorter, less deeply forked, white areas of the plumage without buffy tints, forehead darker, basal under tail-coverts with much less white. Type. — No. 145,007, Am. Mus Nat. Hist., 9 ad., Ollantaytambo, alt. 9700 ft., Peru, July 22, 1916; F. M. Chapman. Description of type. — General coloration fuscous, the wings and tail with olivaceous reflections; sides of the nape white more or less tinged with dusky; auriculars dusky; rump white; upper tail-coverts like the back; outer tail-feathers lacking the greenish lustre of the others and paler basally ; inner secondaries paler than outer quills and faintly tipped with whitish; under wing-coverts dusky, the smaller ones browner; under parts white, the sides and flanks more or less dusky; longer lower tail-coverts fuscous, shorter ones white basally, broadly tipped with dusky or fuscous; depth of tail-furcation 12.5 mm. lSee also "Descriptions of Proposed New Birds from Peru, Bolivia, Argentina, and Chile." Bull. Am. Mus. Nat. Hist., XLI, 1919, pp. 323-333. 2 Published by permission of the Trustees of the American Museum of Natural History. 54— Pkoc. Biol. Soc. Wash., Vol. 32, 1919. (253)
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