io8 
THE CONDOR 
Voi,. VII 
vast colony, with fresh eggs at this date; common off San Domingo and Abreojos 
Points June 14-17111. This is the most abundant shearwater up and down this 
coast during the early summer. 
" Puffinus auricularis C. H. Townsend. Townsend Shearwater. This little- 
known species was found common at sea between Cape St. Lucas and San Bene- 
dicte Island during April, May and June, and was found breeding in a large colony 
on San Benedicte Island on April 30th, with large young at this date; on Clarion 
Island, May 20th, it was also breeding abundantly, with large young; was common 
about .Socorro Island May 24th; abundant at Cape St. Lucas June 3rd. 
Puffinus griseus (Gmel.). Dark-bodied Shearwater. Common off San Domin- 
go Point June 14th and off Natividad Island June 30th. 
Puffinus cuneatus Sal yin. Wedge-tailed Shearwater. This shearwater 
breeds by thousands on San Benedicte Island, entering the burrows apparently 
about April 1st. We found them busily occupied on April 30th but without eggs; 
a second visit to the island on the 1 8th of May showed in a few places green twigs 
dragged to the entrance of the burrow, but no eggs, and it was not until the 31st 
of May, when we visited the island a third time, that we found the first egg of this 
species. The species is seldom seen about Socorro or Clarion Islands, but was seen 
as far north as Cape St. Lucas on June 5th. 
Puffinus bulleri Salyin. New Zealand Shearwater. A gray shearwater seen 
near Cape St. Lucas on June 5th which was not taken was conditionally referred 
to this species. 
Halocyptena microsoma Coues. Least Petrel. This little petrel breeds on San 
Benitos Islands, rather plentifully in certain spots among the rocks, the eggs being 
partially incubated on July 14th; was common off San Domingo Point on June 14th; 
is apparently not seen about the breeding grounds before June 1st. 
Oceanodroma kaedingi Anthony. Kaeding Petrel. This species is to be 
found from Guadalupe south to Socorro during June and July, but was not seen 
along the shore line in company with the others of the genus; apparently not seen 
in these waters before the middle of May. The breeding grounds of this species are 
as yet unknown, but it is probable that the birds occupy the burrows of the Guad- 
alupe petrels on Guadalupe Island after the breeding season of the former is closed. 
Oceanodroma macrodactyla (Bryant). Guadalupe Petrel. This species, pe- 
culiar to the immediate vicinity of Guadalupe Island, breeds sparingly on the 
island, eggs taken on the 25th of March being slightly incubated; the birds may 
be seen at sea near the island. The breeding habits of this petrel differ materially 
from the other petrels found breeding in these waters in that they lay their eggs 
at least 100 days earlier than the others, and also instead of selecting low, sandy 
or rocky situations for their burrows, are only to be found nesting in burrows at 
the extreme top of Guadalupe Island, at an altitude of over 4000 feet above sea 
level, and in pine and cypress groves at that. 
Oceanodroma melania (Bonap.) Black Petrel. Breeds abundantly on San 
Benitos Islands, eggs taken July 14th being partially incubated; was common off 
San Domingo Point on June 14th and near Guadalupe Island on July 25th; ap- 
pears during May in these waters with the other petrels breeding on the Benitos. 
Oceanodroma socorroensis C. H. Townsend. Socorro Petrel. This species al- 
so breeds abundantly on the San Benito Islands, having eggs partially incubated 
on the 14th of July. It is to be seen from this point south to Socorro (and beyond?) 
at this time of year, appearing coincident with the other petrels breeding on the 
Benitos. It is interesting to note that during the trip south to .Socorro Island, 
prior to May 1st, no petrels were seen except Oceanodroma macrodactyla at Guada- 
