59.82(8) : 
Article XI.— DESCRIPTIONS OF PROPOSED NEW BIRDS FROM 
CENTRAL AND SOUTH AMERICA. 
By Frank M. CHAPMAN. 
This paper is, in effect, the fourth preliminary publication on collections 
which the American Museum has in recent years received from Colombia. 
Since, however, the identification of this material has in some instances 
led to the discovery of apparently undescribed forms beyond the limits of 
Colombia, it has been deemed inadvisable to employ here the restricted 
title used for the preceding papers ! in this series. 
For the loan of specimens used in comparison I am indebted to the 
United States National Museum, through Dr. C. W. Richmond, the Field 
Museum, through Mr. C. B. Cory; the Academy of Natural Sciences at 
Philadelphia, through Dr. Witmer Stone; the Brooklyn Institute, through 
Mr. R. C. Murphy; the Carnegie Museum, through Mr. W. E. C. Todd, 
and to Mr. Thomas E. Penard, of Arlington, Mass. 
The color terms employed will be found figured in Ridgway’s ‘Color 
Standards and Nomenclature’ (Washington, 1912). 
Odontophorus guianensis panamensis subsp. nov. 
Char. subsp.— Distinguished from all its allies by its white or whitish chin and 
browner throat, the feathers of the front, and, to a lesser degree, sides of which have 
one or two white or whitish bars or spots; it further differs (1) from O. g. guianensis 
in having cinnamon-rufous instead of buffy ear-coverts, and (aside from this charac- 
ter) in having the brown markings of the head much reduced in intensity and extent; 
(2) from O. g. marmoratus in having much more brown or cinnamon-rufous about the 
head; (3) from O. g. castigatus in having the back anteriorly grayish (as in the more 
southern forms) instead of brownish; the crown and chestnut-brown markings of 
the head paler. 
Type.— No. 45165, Am. Mus. Nat. Hist., o ad., Panama R. R. Line; McLean- 
nan & Galbraith. | 
1 ‘Diagnoses of apparently new Colombian Birds, I.’ Bull. A.M. N. H., Vol. XX XI, 
1912, pp. 130-166. 
‘Diagnoses of apparently new Colombian Birds, II.’ Bull. A. M. N. H., Vol. XXXTIT, 
1914, pp. 167-192. 
‘Diagnoses of apparently new Colombian Birds, III.’ Bull, A. M. N. H., Vol. XXXTIT, 
1914, pp. 603-637. 
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