156 THE NATURALIST’S GUIDE. 
in having the forehead quite white; a few white feathers on 
the back of the head; the black is not quite as intense, or 
more brownish. The feathers of the back are edged with 
rufous. The shoulders are darker. The tail is not as 
deeply forked, and the tips of the feathers are rufous. The 
whole under parts are pure white. The white line from 
the base of the bill is discontinued just in front of the ey ° 
and the portion occupied by it is quite dusky, almost black! 
The feet are dull orange. The bill is black, with the base 
of the lower mandible orange. 
* The S. hirundo differs from this species, in the adult stage, 
in having the heak longer and more curved, with the color 
bright orange, and the terminal portion always black. 
The pearl gray of the upper and under parts is never as 
deep, while the lower part of the back is always quite pale, 
so that the white of the rump is not as abrupt in its com- 
mencement. The throat and chin are always white, with- 
out the ashy tinge. The feet are larger, the tarsi much 
longer. The tarsi also lack the ridged transverse scales ; 
they are smoother; the webs are also smooth; the color 
is pale orange, never approaching the carmine of the 
other. 
Tn the next stage there is more white on the head of 
S. hirundo ; the bill is almost black ; the rump tinged with 
ashy. 
Young-of-the-year birds are readily distinguished by the 
rump of Arundo being ashy, the feet larger, the tarsi longer 
with a smoother appearance. The bill is much the same 
color, but in Azrundo it is longer. It never has the dusky 
appearance below the eye seen in macroura. 
276. Sterna paradisea — Roseate Tern. This, with 
the two preceding species, is called the ‘“ Mackerel Gull” 
on the more northern sections of the coast, while on the 
south shore the two preceding are called “Té-arrs,” from the 
note ; this species is called “ Hoyt” for the same reason. 
