34 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



seen by Mr. Frazar near Montserrat Island on March 4, 1887. In view of all 

 this and of the fact that F. aethereiis is known to breed in some numbers on 

 San Pedro Martir Ishiiid, " a rock about one and a half miles long, nearly 

 as broad, and 1045 feet in height," ^ situated in the Gulf of California, a 

 little north of latitude 28° and about midway between Lower California and 

 the mainland of Mexico, we may assume that the bird occurs regularly and 

 not infrequently in the waters immediately about the Cape Region proper, 

 although this does not seem to have been as yet definitely established. Of the 

 San Pedro Martir colony Colonel Goss has given us the following interesting 

 acaount : — 



" The birds breed in holes and crevices on the sides of the steep cliflFs that often 

 overhang the water ; many were inaccessible. I was therefore able to reach and 

 examine but few of their nesting places. These were witliout material of any kind 

 for a nest; the egg (for they lay but one) was upon the bare rock. In nearly all, 

 liowever, I found a young bird, about half grown ; from tiiis I think the birds 

 begin to lay as early as the middle of February. With the aid of the Indians, who 

 are expert climbers, I was only able to procure and save seven of their eggs. The 

 ground color is dull grayish white, rather finely and evenly sprinkled with deep 

 claret brown, generally thickest at large end, the specks running largely together, 

 giving the eggs a clouded or marbled look. In form they are ovate. Measure- 

 ments of the same, 2.31 X 1.71,2.40 X 1.72, 2.40 X 1-78, 2.26 X 1-71, 249 X 1.81, 

 2.40 X 1.69, 2.38 X 1-68. When approached the birds within their homes do not 

 attempt to leave, but vigorously defend the same, striking and biting with their 

 strong, pointed, sharp-edged, jagged bills, lacerating the ungloved hand that dares 

 intrude, uttering at the same time a loud, harsh, rapid cke-cke-che-che-che-cke-che, — 

 notes of defiance, and often heard in their rival flights. The birds are very beau- 

 tiful, and cannot fail to attract attention, especially when in tlie air, by the peculiar 

 rapid stroke of their wings and graceful waving motion of their long whip-like 

 tails." 2 



The Red-billed Tropic Bird has been seen by Mr. Bryant as far north on the 

 Pacific coast of the Peninsula as Cape Colnett (about latitude 31° 15'), and a 

 skull is said to have been found near San Francisco many years ago.8 



Sula bre^wsteri Goss. 

 Brewster's Boobt. 



Sula hucogastra (not Pelecanus lencogaster Boddaert) Beldixg, Proc. U. S. Nat. 



Mus., VI. 1883, 352 (near Pichalinque Bay). 

 Sula sula (not Pelecanus suln Likxaecs) Bryant, Proc. Calif. Acad. Sci., 2d sen, 



II. 1889, 253 (near PichaUnque Bay). 



An immature Gannet taken near Pichalinque Bay in January, 18S3, by Dr. 

 H. Ten Kate, was recorded by Mr. Belding as an example of Sula leucogastra, 



1 Goss, Auk, V. 1888, 240. ^ Gqss, Loc. cit., 244. 



3 Bryant, Proc. CaUf. Acad. Sci., 2d ser., II. 1889, 86, footnote. 



