Vor. IIT] BECK—CALIFORNIA WATER BIRDS 63 
29. Larus canus. Mew Guti.—I learn from Mr. Gifford 
that the characters ascribed to “Larus brachyrhynchus” are all 
to be found in Larus canus, which is a common winter bird on 
this coast. 
30. Larus heermanni. HEERMANN’s GULL.— Migration 
northward from the subtropics and tropics after the breeding 
season is well illustrated in Heermann’s Gulls. They arrive 
from the south in force in June and July and with the advance 
of the season increase in numbers, at times rivaling the most 
abundant of the other gulls. They decline with the approach 
of their breeding season and in April and May are represented 
in this vicinity only by stragglers. By the latter part of Jan- 
uary, 1908, the majority were white-headed. 
31. Larus philadelphia. BoNnaparte’s GuLL.—This is not a 
winter gull in the vicinity of Point Pinos. Three individuals 
December 9 and one December 24, 1907, are all I have to 
supplement Mr. Loomis’s record of December 19, 1894. As a 
bird of passage, it is very common in later April and in May, 
about to the close of the third week. It is common in October 
and remains on into November. 
32. Kema sabini. Sapinr’s GULL.—Ocurring in abundance 
in winter at Callao Bay, Peru, it is not surprising that these 
culls pass Monterey in considerable numbers. 
During the latter part of September, 1903, they were com- 
mon off Point Pinos, journeying southward. Some eighty 
specimens were taken. 
In 1907, about fifty were seen on July 22; they were common 
by July 30 and abundant through most of August; a few were 
noted along during September; the last one seen was on 
October 28. 
In 1909, a few were observed during the last of August and 
through September. One was secured on October 6. 
In returning to their nesting grounds, they apparently keep 
well offshore. I am able to report only eleven birds for the 
return-migration—all observed between the 15th and 21st of 
May, 1907. 
In the Academy’s collection there are one hundred and 
thirty-three specimens from this vicinity. 
33. Sterna maxima. Royat Tern.—Mr. Loomis found the 
Royal Tern decidedly common at intervals during his sojourn 
in December, 1894, and January, 1895. I failed to find them 
. 
