36 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Phalacrocorax dilophus albociliatus Ripvew. 
FARALLONE CORMORANT. 
Graculus dilophus (not Pelecanus (Carbo) dilophus Swarxson) Barrp, Proc. Acad. 
Nat. Sci. Phila., 1859, 301 (Cape St. Lucas), ? 306 (Cape St. Lucas). 
Phalacrocorax dilophus cincinnatus (not Carbo cincinatus Branpt) BELpDING, Proc. 
U.S. Nat. Mus., V. 1883, 545 (Cape Region). 
P. [halacrocorax] cincinnatus (not Carbo cincinatus Branpt) Benne, Loc. cit., 548 
(La Paz). 
Phalacrocorax dilophus albociliatus RipGway, Proc. Biol. Soc. Wash., II. 1884, 94, 
95 (orig. deser.; coast of California to Cape St. Lucas and W. Mexico). 
Bryant, Proce. Calif. Acad. Sci., 2d ser., II. 1889, 253-257 (Cape St. Lucas 
and elsewhere in Cape Region; feeding and nesting habits). 
Mr. Belding characterizes this Cormorant (under the name P. cincinnatus) 
as ‘very common at La Paz in the winter months; rare in March.” Mr. 
Frazar took a male in adult plumage, but without the nuptial pluimes, at Car- 
men Island, on March 6. On March 15 he found about a dozen pairs breeding 
on a round, high rock, of an acre or less in extent, near San José Island. The 
nests, which were built on dead cactuses, contained young birds nearly full 
grown. Mr. Bryant says: — 
“The numbers of these birds which congregate at Magdalena Bay is almost 
incredible. Many mornings I have been attracted by the noise of thousands fishing 
some distance off shore and have watched through a glass the dense, dark mass 
as they passed a given point. Those half a mile or more in the rear came flying 
forward in platoons and alighted at the head of the broad line, making the water 
turbulent with commotion while their numbers were being constantly augmented 
by the arrival of stragglers from the sides and rear. Mingled with the myriads of 
cormorants were often many California brown pelicans plunging for fish, while 
above all hovered Heermann’s gulls, robbing at every opportunity. To all appear- 
ances, they were following a great school of fish, astounding numbers of which 
must be daily consumed by these voracious feeders. .. . 
“Cormorants were seen along the estero to San Jorge, and in April, 1889, on the 
lagoons in lower Purisima cafion, but no nesting colonies were found except on 
Santa Margarita Island. On that island they built upon mangrove bushes bor- 
dering a small lagoon. . 
“Many of the cormorant’s nests, in fact all of those first constructed, were upon 
the same mangroves as were used by the frigate pelicans, but only the highest 
branches were appropriated by the cormorants. .. . 
“When I first visited this colony (January 14, 1888,) a few of the nests contained 
eggs, and scores of others were in varying stages of construction. The great rush 
of cormorants to Santa Margarita Island did not occur until April or latter part of 
March. . 
“Some of the nests contained fresh eggs as early as January 14, and I was told 
they had been taken by the people for food two weeks before.” 
