BIRDS — PENELOPIDAE — ORTALIDA M'CALLI. 611 
Comparative measurements of species. 
Catal. 
No. 
Species. 
Locality. 
Sex. 
Length. 
Stretch 
of'wings. 
Wing. 
Tail. 
Tarsus. 
Middle 
rts claw 
alone. 
Bill 
above. 
Along 
gape. 
Specimen 
measured. 
New Leon, Mex. . . 
<J 
8.30 
8.50 
10.84 
2.34 
2.48 
0.54 
1.06 
1.12 
Skin .... 
Fresh . . . 
23.50 
2G.25 
ORTALIDA McOALLI, Baird. 
Chiacalacca. 
Ortalida vetula, Lawrence, Ann. N. Y. Lyc. V, 1851, 11G. (Not Penelope vetula, Wagler, Isis, 1830, 1112, and 
1831, 517.) 
Ortalida poliocephala , Cassin, Illust. I, ix, 1855, 267 ; pl.xliv. (Not Penelope poliocephala, Wagler, Isis, 1830, 1112.) 
Sp. Ch. — Body above dark greenish olive ; beneath brownish yellow, tinged with olive. Head and upper part of neck 
plumbeous. Tail feathers lustrous green, all tipped with white, except the middle one. Feathers along the middle of the 
throat black ; outer edge of primaries tinged with gray. Eyes brown. Bill and feet lead colored. Length, 23.50 ; wing, 8.50 ; 
tail, 11. 
The bill of this species is rather long and considerably decurved anterior to the nasal groove ; 
the commissure curved almost as much as the culmen. The tarsus is about equal to the middle 
toe ; the anterior half covered by a series of large transverse scutellae, with another series on 
each side meeting behind in a sharp ridge, except superiorly. These lateral series are separated 
from the anterior by a narrow strip of skin. The outer toe is rather longer than the inner ; the 
claw falling considerably short of the middle claw. Hind toe without its claw about one-third 
the middle toe and claw ; it is situated on the same level with the others. 
The feathers of the head are lengthened and pointed, producing a decided full crest. The 
side of the head is naked to behind the eyes ; the chin is naked, with rather more than the 
central third longitudinally covered by black feathers, with stiffened shafts and abbreviated 
vanes. The tail is longer than the wings, broad and graduated ; the lateral feather about 
three-fourths the middle. The secondary quills are long and broad, fully as long as the 
primaries. The wing is concave and much graduated ; the first and second quills much shorter 
than the secondaries. 
I feel considerable uncertainty as to the specific name of the subject of the present article. 
The O. vetula 1 is said to be olivaceous ; the head and ears slaty gray ; the flanks, crissum, and 
tibia, brownish ; the epigastrium and belly somewhat rufous ; the tail feathers above bronze 
green, with white tips. The length, 18 inches ; longest tail feathers, 9.17 ; the shortest, 6.50. 
The adult O. poliocephala 2 is olive gray ; the head and upper part of neck slate color ; the 
epigastrium, middle of belly, and tibia, white ; the flanks and crissum fulvous ; the tail 
feathers bronzed black, tipped with fulvous. The young has the head and occiput slate gray • 
epigastrium, belly, and tibia brownish rufous ; the tail like the adult, (tipped with fulvous.) 
Length, 23 inches ; tail, 11 inches. 
The specimen before me agrees with neither species as described by Wagler. It is most like 
the young of O. poliocephala as to size and general color, but the tail is tipped with white in all 
1 Penelope vetula, Wagler, Isis, 1830, 1112, No. 14. Mexico. 
2 Penelope poliocephala, Wagler, Isis. 1830, 1112, No. 15, Mexico. 
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