122 REVIEW OF AMERICAN BIRDS. 
B. Tail feathers, except central, black; 
the exposed surface and tips only varied 
with white. 
1. Bill and legs very stout, the former 
longer than the head. Wings longer 
than tail. A concealed nuchal half 
collar of white streaks. 
Color much as in 7. bewickii, but 
whiter beneath. Outside of 
wings very obsoletely banded 
2. Bill and legs more slender; some- 
times the bill shorter than head. 
Tail longer than the wings. Nocon- 
cealed nuchal half collar. 
Above dark rufous brown; be- 
neath plumbeous white ; flanks 
tinged with brown. Rumpand 
exposed secondaries distinctly 
banded. Quills and middle 
tail feathers brownish-black . 
Above ashy-brown; beneath, in- 
cluding flanks, clear white; 
rump ashy, and, like seconda- 
ries, very obsoletely barred. 
Quills and middle tail feathers 
grayish-brown . . . 
Colors intermediate between the 
two last. Bill longer, from 
nostril, .50, from gape .81, in- 
stead of .39 and .70 : : 
2. Exposed surface of wings barred; upper tail 
coverts not barred. Beneath white. Tail 
feathers reddish-brown, banded with black, 
except in petenicus. 
a. Above quite uniform reddish-chestnut. 
1. Sides ashy . ° ° . ° 
2. Sides brownish . a : 5 
&. Grayish-brown above, ramp rufescent. 
1. Sides brownish . . : . 
c. Crissum plain, without bands. 
1. Outside of wings obsoletely banded. Beneath 
white; flanks and crissum fulvous. 
a. Bill shorter than tarsus. ° . 
2. Outside of wings and wing coverts distinctly 
banded. Beneath white; flanks and anal 
region very pale fulvous. 
a. Bill longer than tarsus . . . 
3. Similar to last above; throat white; rest of 
under parts fulvous. 
[PART I. 
petenicus. 
bewickit. 
leucogaster. 
spilurus. 
poliopleura. 
rufalbus. 
sinaloa. 
modestus. 
albipectus. 
