14 PACIFIC COAST AVIFAUNA No. 7 



December 22, 1911. Recorded from San Diego by J. G. Cooper (B., Br. & Ridg., 

 W. B. N. A. II. 1884, 224) and A. W. Anthony (Auk xxiii, 1906, 131). 



22. (49) Larus occidentalis Audubon. Western Gull. 



Abundant resident. Breeds in May and June on all the Santa Barbara 

 Islands. Occasional inland in winter. During the breeding season most of 

 the Western Gulls seen along the shore of the mainland are immature birds. 



23. (51) Larus argentatus Pontoppidan. Herring Gull. 



Fairly common in winter along the coast, south to Lower California. 

 Occasional on inland lakes and ponds. Arrives about September and remains 

 until May. 



24. (53) Larus californicus Lawrence. California Gull. 

 Common along the coast from September until early May. Occasional 



inland. One bird was noted by J. Grinnell off Catalina Island, May 12, 1897 

 (Pub. 1, Pasadena Acad. Sci., 1897, 23). 



25. (54) Larus delawarensis Ord. Ring-billed Gull. 



Abundant winter visitant along the coast from September to May. Occa- 

 sional inland. 1 found this species common at Alamitos Bay, Los Angeles 

 County. September 17, 1907, and abundant at Hyperion, Los Angeles County, 

 April 25, 1910. Immature birds were rather plentiful in the latter locality 

 as late as May 24 (1910). 



26. (55) Larus brachyrhynchus Richardson. Short-billed Gull. 

 Rather rare winter visitant along the coast, south at least to San Diego. I 



have never met with this species in southern California, but it has been recorded 

 as follows : B. W. Evermann found a specimen dead on the beach near V^entura 

 in December, 1879 (Auk iii, 1886, 88). According to H. W. Henshaw, it was 

 not uncommon along the coast of southern California during the winter of 1884 

 (Auk II. 1885, 232). In the Salvin-Godman collection in the British Museum are 

 a male adult collected by Mr. Henshaw at Ventura in November and a pair of 

 juvenals collected at San Diego in December (Saunders, Cat. Birds Brit. Mus. 

 XXV, 1896, 284). 



According to E. W. Gifford, of the California Academy of Sciences, the 

 specific characters ascribed to this form are all to be found in Larus canus 

 (Beck, Proc. Cal. Acad. Sci., ser. 4, vol. iii. 1910, 63). 



27. (57) Larus heermanni Cassin. Heermann Gull. 



Very common along the coast and among the islands from the last week in 

 May until the middle of March. Originally described from San Diego (Proc. 

 Acad. Nat. Sci. Phil, vi, 1852, 187). This interesting species may be found 

 along our coast every month in the year. The majority, however, leave for 

 their breeding grounds off the Mexican coast during the month of March and 

 return during the last week in May and the month of June. This is the only 

 species of the genus on our coast that goes south to breed. 



28. (60) Larus Philadelphia (Ord). Bonaparte Gull. 



Common along the coast in fall, winter and spring. Frequently seen on in- 



