358 CALIFORNIA ACADEMY OF SCIENCES [Proc. 3D Ser. 



Larus heermanni. Heermann's Gull. — In May Heer- 

 mann's Gulls were rare. In June they increased in num- 

 bers, becoming decidedly common by the second week. 

 White-headed birds predominated. 



An autumn specimen has several primary coverts on both 

 wings abnormally white. 



Larus philadelpliia. Bonaparte's Gull. — During a 

 gale May i several bands of these Gulls on migration 

 passed the Monterey harbor. Then there was a hiatus, 

 broken only by a few loiterers, until the loth, when began 

 an influx which lasted for more than a week. On the 14th 

 and 17th it was at its height. On the former day numerous 

 flocks occurred on the water and on the latter day an exten- 

 sive flight took place, which was continued on a smaller 

 scale on the i8th. This movement closed the northward 

 migration of the species in the vicinity, for onl}' stragglers 

 were met with afterwards, a young bird, June 2, being the 

 last one. This bird, forsaken by his fellows, had sought 

 the companionship of the Loons in the Monterey harbor. 

 Two days before, apparently the same bird was seen in 

 company with some sickly American Coots that had found 

 an asylum on a lagoon near the harbor. 



White-throated birds with the tail band were in the 

 majority, and pied-headed ones were plentiful. Neverthe- 

 less, in every flock there was a fair proportion of adults 

 in full nuptial plumage, proving that the young are not 

 without experienced leaders in the closing of the return 

 migration. 



Xema sabinii. Sabine's Gull. — A fine adult male in 

 high breeding plumage was shot May 12. These Gulls 

 probably pass Monterey Bay in considerable numbers, for 

 they have been found in abundance as far south as Callao 

 Bay, Peru.^ However, those visiting Peru may pursue the 

 same route as the Franklin's Gulls. 



Since the above was written, the Academy has come into 

 possession of two additional specimens from Monterey Bay, 



1 MacFarlane, 'Ibis,' 5th Ser., Vol. V, p. 207. 



