612 
U. S. P. R. R. EXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT. 
ages instead of the fulvous, so strongly insisted on by Wagler as occurring in both old and 
young. The size is considerably larger than that of 0. vetula; the flanks, tibia, and crissum 
are more fulvous than brownish, and the entire head and upper part of the neck are slaty 
instead of the head and ears only. 
More adult specimens than the one before me are said to be generally of a brownish olive, 
darker on the, head, (probably somewhat slaty ;) the breast and belly light rufous, with 
longitudinal whitish pencillings ; as nothing is said of the tibia, they are probably not white, 
but like the flanks. The irids are dark hazel ; the naked skin of the chin orange red and loose. 
Upon the whole, I am inclined to believe that this bird is distinct from both vetula and 
2)oliocephala, and therefore propose for it the name of McCallii, after Colonel McCall, late 
inspector general of the United States army, whose admirable biographies of the animals of 
Texas and New Mexico have added so much to our knowledge of their natural history. His 
notes on the present species in Cassin's Illustrations (I, 268) furnish all on record of its habits, 
and from his description has been derived the preceding account of the colors of the adult. 
List of specimens. 
Catal. 
No. 
Sex. 
Locality. 
When collected. 
Whence obtained. 
Orig. 
No. 
Length. 
Stretch 
of wings. 
Wing. 
1410C 
3 
Spring of 1853 
137 
23. 50 
26. 25 
8.50 
1 Eyes brown ; bill blue, lead color, and slate ; feet lead color. 
