le BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
This species visits various parts of northern South America in winter, and a 
few birds are supposed to breed in northern Mexico, but the majority doubtless 
nest north of the southern boundary of the United States. 
Aegialitis semipalmata (Bonapr.). 
SEMIPALMATED PLOVER. 
Aegialitis semipalmata Beipinc, Proc. U. S. Nat. Mus., VI. 1883, 351 (s. of lat. 
24° 30’). Bryant, Proc. Calif. Acad. Sci., 2d ser., II. 1889, 274 (near La 
Paz). 
Mr. Frazar found this Plover common at La Paz in February, at Carmen 
Island in March, and at San José del Cabo from August 23 to the latter part 
of October. Mr. Belding notes it as ‘moderately common”’ south of latitude 
24° 30’, and Mr. Bryant saw a flock of seven at Magdalena Bay on March 12, 
1889, while Mr. Anthony reports it common at San Quintin Bay. 
The Semipalmated Plover breeds in the Arctic and Subarctiec regions, and on 
the west coast of America migrates as far south as Peru and Chili. 
Aegialitis nivosa Cass. 
Snowy PLovER. 
Aegialitis alecandrinus nivosus BELDING, Proc. U.S. Nat. Mus., V. 1883, 545 (Cape 
Region). 
Aegialitis nivosa Bryant, Proc. Calif. Acad. Sci., 2d ser., II. 1889, 274 (Cape 
Region). 
The numerous autumnal specimens of the Snowy Plover collected by Mr. 
Frazar show surprisingly little variation except in respect to size. The adult 
males are quite as ashy above as the young birds, from which they can be dis- 
tinguished, however, by the much darker bars on the sides of their breasts and 
by the presence of a few black feathers on that part of the forehead occupied 
by a conspicuous black band in breeding males. 
Mr. Frazar saw a small flock of Snowy Plover in March on the island of San 
José. He afterwards found them at San José del Cabo where they were com- 
mon during September, October, and the first half of November, occurring 
usually in flocks of not more than six or eight birds, although fully thirty 
were seen together on one occasion. They were very tame, but when pursued 
attempted to elude observation by squatting in holes or depressions. At one 
time all the birds of the large flock just mentioned concealed themselves in 
footprints left by horses in the sand of the beach, showing only their heads 
above the level of the surrounding surface. 
Mr. Belding makes only a nominal mention of this species in his papers 
relating to the Cape Region. To the northward Mr. Bryant has found it common 
