Vol. XVII 
z 1900 
NELSON, Description of a New Turkey, etc. 125 
Distribution.— All of Mexico (except Yucatan and the Pacific coast 
from Colima to the northern border), and north into Texas, New Mexico, 
and southeastern Arizona. 
General Notes.— Swainson described this bird from the “ Table- 
land of Mexico.” The type was in the Bullock collection, which 
was made in the region about the Valley of Mexico, so birds 
from that district may be considered typical. 
Sayornis nigricans semiatra (Vigors). Under tail-coverts pure white. 
Distribution. — Pacific coast of Mexico and the United States from 
Colima to Oregon, including most of Arizona. 
General Votes— Vigors described his bird from a specimen 
collected during the voyage of the ‘Blossom’ but gives no local- 
ity or habitat. The collection of birds made on the west coast of 
America during this voyage came mainly from near San Blas, 
Mexico, and Monterey, California; both within the range of the 
form having the pure white under tail-coverts. This being the 
case, we may consider birds from near Monterey, California, as 
typical. ; 
Sayornis nigricans aquatica (Scl. & Salv.). Under tail-coverts dingy 
blackish. 
Distribution. — Guatemala and south to Costa Rica. The type of this 
form was described from a specimen taken at Duefias, Guatemala. 
General Notes. — Specimens from Chiapas, Mexico, are midway 
between true S. mzgricans and S. aguatica and there appears to be 
a regular gradation from one to the other. The same state of 
affairs exists to the north where the ranges of S. nigricans and 5S, 
semiatra join. Birds from Texas, New Mexico and Northern 
Mexico have much less distinctly dusky streaked under tail- 
coverts than those from Central Mexico, but should be referred 
to true S. zzgricans. Both of these forms are thus found within 
the border of the United States. 
Agelaius phceniceus sonoriensis Rid. 
In his ‘ Manual’ Mr. Ridgway substituted Salvadori’s /ongtros- 
tris for his own sonoriensis as a name for the Red-winged Black- 
birds of Arizona and western Mexico, mainly because the habi- 
tat of A. /ongirostris was given as western Mexico. Salvadori 
described A. /ongirostris from a single adult male, and as the 
