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tJ S. p. E. B. EXP. AND SUEVEYS — ZOOLOGY — GENERAL EEEOET. 



List of specimens. 



1 Length, 9.00 ; Extent, 12.50 ; Iris redish brown. 



PIPILO MBSOLEUCUS, Baird. 



Pipilo mesoleucus, Baird, Pr. A. N. Sc. Ph. YH) June 1854, 119. (Rocky Mountains.) 



Sp. Ch. — Above olivaceous brown, with a grayish tinge ; hood dull chestnut, conspicuously diSerent from the back. Sides 

 beyond the edge of the wing like the back, but paler ; posteriorly, and about the vent and under tail coverts, pale brownish red. 

 The ashy olive brown of the sides scarcely meeting across the breast, the lower portion of which, with the upper belly, is rather 

 pure white. The chin, throat, and upper part of the breast pale yellowish rufous, spotted on the sides and across the bjeast 

 with brown ; an obscure spot in the middle of the breast ; edge of outer primary white. 



Length 8.50 inches ; wing, 3.80 ; tail 4.70. 



Hab, — ^Valley of upper Rio Grande and across to the Gila River. East to Santa Caterina, New Leon. 



This species is similar in general appearance to the P. fuscus, tut the olive brown and rufous 

 are both of a lighter shade. The crown is of a decided chestnut, conspicuously different from the 

 back, instead of nearly the same tint. The light reddish under the head is wider throughout 

 and extends down to the upper part of the breast, blending with the colors of the breast and 

 belly, instead of being narrower, more sharply defined, and restricted to the chin and throat. 

 The isolated larger spot on the breast is more conspicuous ; the breast and belly are quite pure 

 white, shaded with obsolete brownish blotches, instead of being uniform grayish brown, with 

 only an approach to whitish in the very middle. The edges of the wing and tail feathers are a 

 good deal lighter, the outer web of the first primary being sharply edged with pure white, 

 instead of obscure grayish brown. The size generally is rather smaller. • 



