26 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



Munro (1944) reported a specimen from Molokai and another, 

 probably from Maui, in the St. Louis College Collection, Honolulu. 



Ring-billed gulls breed throughout much of northern North America 

 and migrate south throughout the interior of the United States. In 

 winter they are found as far south as southern Mexico along the Pacific 

 coast and southern Florida along the Atlantic coast (AOU, 1957). 



Herring Gull Lams argentatus vegae 



Twelve specimens of herring gulls have been collected in the Leeward 

 Islands by POBSP personnel. All were identified subsequently as 

 L. a. vegae by Laybourne, Short, or Thompson. These specimens are 

 as follows : 



Kure Atoll: USNM 493348, 493349, 493350, Mar. 10, 1963; 

 USNM 494375, Nov. 10, 1964; USNM 494367, Jan. 20, 1965; USNM 

 494371, Mar. 8, 1965; USNM 494374, Apr. 1, 1965. 

 Midway Atoll: USNM 493351, Feb. 25, 1963. 

 Laysan Island: USNM 493352, Feb. 12, 1963. 

 Lisianski Island: USNM 493353, Feb. 14, 1963. 

 Pearl and Hermes Reef, Southeast Island: USNM 493346, Feb. 

 27, 1963. Kittery Island: USNM 493347, Mar. 5, 1963. 



These specimens were all young birds that had not yet attained 

 adult plumage. Six of the gulls (493346, 493348, 493349, 493350, 

 493351, 494371) were in first winter plumage; four (493347, 493352, 

 493353, 494374) were in first nuptial plumage; and two (494367, 

 494375) were in second winter plumage (Dwight, 1901). 



Specimens of herring gull have been recorded from Laysan (Bailey, 

 1956), Oahu (King, 1959a), and Midway (Bryan, 1962b). None have 

 been reported previously from Kure, Lisianski, or Pearl and Hermes 

 Reef. 



The subspecies L. a. vegae breeds in Siberia and winters as far south 

 on the Asiatic coast as central China and Formosa. It wanders 

 casually to western Alaska, the Aleutians, and British Columbia 

 (AOU, 1957). 



Slaty-backed Gull Larus schistisagus 



Fleet and Standen collected an adult male in winter plumage Mar. 9, 

 1965, on Green Island, Kure Atoll (USNM 494373). No slaty-backed 

 gulls have been reported previously from any of the islands of the 

 main Hawaiian or Hawaiian Leeward groups. This species breeds in 

 Northeastern Siberia, south to the northern part of Japan, and 

 winters as far south as the coast of China. It has been recorded in the 

 Aleutians, Pribilofs, and on the coast of Alaska (AOU, 1957). 



