Vol. II, Pt. I] GIFFORD— BIRDS Of THE GALAPAGOS ISLANDS 53 



In Baja California the species was first met with on San 

 Martin Island, July 11, 1905, where one was seen in com- 

 pany with seven Black Oyster-catchers {Hcematopus niger) 

 on the shores of the lagoon. At the next stop, San Geronimo 

 Island, July 13, eight of the first species and twelve of the 

 second were observed, all on the rocks along the beaches. 

 They proved fairly easy of approach, and when flying kept up 

 a continual calling. At the San Benito Islands, July 14 and 

 15, Frazar's Oyster-catcher was in the ascendency, ten or a 

 dozen being seen each day to only one of the Black, while at 

 South Bay, Cerros Island, July 18, it was fairly common, and 

 only two or three Black Oyster-catchers were encountered. 



Squatarola helvetica: Black-bellied Plover 



Albemarle, Charles, Chatham, Hood, Indefatigable, and 

 James islands. 



The Black-bellied Plover was not common, but was ob- 

 served a dozen or more times on the above islands, where it 

 was very wild. There was an interval of three months dur- 

 ing which the species was not seen — April 25 to July 28. 



Mr. Beck reports^ having seen two Black-bellied Plovers 

 on Clipperton Island on November 19, 1901. 



Two Wilson's Plovers (Ochthodromus wilsoni) were taken 

 on Cocos Island, Costa Rica; a male on September 4 and a 

 female on September 11, 1905. 



.ffigialeus semipalmatus : Semipalmated Plover 



Abingdon, Albemarle, Bindloe, Charles, Chatham, Inde- 

 fatigable, James, Jervis, and Narborough islands. 



Quite a number of this species were observed about the 

 islands from July to April. The earliest bird was noted on 

 July 17 and the latest on April 25. Like the Turnstone, they 

 were found in the grassy uplands as well as on the coast. 



On September 4, 6, and 11, 1905, a few were seen on the 

 beach at Wafer Bay, Cocos Island, Costa Rica, where three 

 males were secured. 



^Condor, v. 9, p. 109. 



