July, 1905 | BIRDS FROM THE WEST COAST OF LOWER CALIFORNIA 
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Aphriza virgata (Gmkl.)- Surf Bird. Sa‘11 Geronimo Island March 15th; 
Turtle Bay April 14th; quite common at Abreojos Point April 19th, moving in 
small flocks. 
Arenaria interpres (Linn.). Turnstone. Quite common in flocks on San Ge- 
ronimo Island March 15th; seen also at Clarion Island May 21st. It is probable 
that the records given here of this species are in reality those of Arenaria morinella 
(Linn.)., as the skins are not at hand and it is doubtful if Arenaria interpres is 
found on the Pacific Coast." 
Arenaria melanocephala (Vig.). Black Turnstone. Quite common in flocks 
on San Geronimo Island March 15th and on San Martin Island March 12th. 
Hamatopus bachmani Aud. Black Oystercatclier. Common on San Martin, 
San Geronimo, San Benitos, Natividad, San Roque and Ascuncion Islands, and at 
Turtle Bay and Abreojos Point; breeds abundantly on San Roque, Ascuncion and 
Natividad Islands, eggs having been taken in all stages of incubation about J une 25th. 
H^matopus frazari Brewst. Frazar Oystercatclier. Common on San Martin, 
San Geronimo, San Benitos, Natividad, San Roque aud Ascuncion Islands, breed- 
ing plentifully on San Rocpie, Ascuncion and Natividad Islands, eggs taken about 
the 25th of June being in various stages of incubation. It is interesting to note that 
in the localities where H. bachmani and //. frazari both breed, several individuals 
were noted that were apparently intermediate in coloration between the two 
species, one in particuiar being noted that was entirely black except the white 
lining of the wings, visible only during flight: it is more than probable that a ser- 
ies could be obtained showing complete and gradual intergadation. 
Zenaidura clarionensis C. H. Townsend. Clarion Island Dove. Abundant on 
Clarion Island; one egg found about May 22nd. 
Zeniadura graysoni (Lawk.). Socorro Island Dove. Socorro Island, not com- 
mon; evidently breeding May 2nd. 
Melopelia leucoptera (Linn.). White-winged Dove. Quite common about 
San Jose del Cabo April 20th, evidently breeding. 
Columbigallina passerina pallascens (Baird). Mexican Ground Dove. Quite 
common about San Jose del Cabo April 20th, evidently breeding. 
Columbigallina passerina socorroensis (Riddw.). Socorro Ground Dove. So- 
corro Island, not common; evidently breeding May 2nd. 
Cathartes aura (Linn.). Turkey Vulture. San Martin Island, March 12th, 
common and apparently ready to nest; Cerros Island, April 1st, a few. 
Buteo borealis lucasanus Ridgw. St. Lucas Redtail. San Jose del Cabo, April 
20th, not common; this subspecies has been found referrable to Buteo borealis 
calurus (Cass.)T 
Buteo borealis calurus (Cass.). Western Redtail. Todos Santos Island March 
10th; Guadalupe Island March 22nd; San Jose del Cabo April 20th; Socorro Island, 
May 2nd; not common anywhere as far as noted. 
Buteo borealis socorroensis Ridgw. Socorro Redtail. Socorro Island, not com- 
mon and very wild; this subspecies has been also referred to Buteo borealis 
calurus. (CASS.). a 
Haliaeetus leucocephalus (Linn.). Bald Eagle. Todos Santos Island, March 
iotli, one pair breeding; nest inaccessible. 
Falco peregrinus anatum (Bonar.). Common on San Geronimo, San Benito, 
Cerros and Natividad Islands, breeding; eggs taken March 13th that were fresh. 
The duck hawk is found breeding commonly on all islands where the Cassin auk- 
lets breed, the auklets being the principal food of the falcons. 
( To be concluded.) 
a Cf. Brewster, Birds of the Cape Region of Lower California. Bull. Harv. Mus. Comp. Zool., XLL 1902. 
