NO. 15 BIRDS OF THE PACIFIC WAR AREA BAKER 57 



White-capped noddy terns were found at Ulithi, Palau, and Truk. 

 They were not seen in the Marianas. Stomachs of birds collected 

 contained small fish. Measurements of 2 adult males are: wing 222 

 and 228, tail 117 and 124, exposed culnien 46.1 and 46.6; of 3 adult 

 females, 228-229 (228), 118-120 (119), 41. 1-43.6 (42.6). 



GYGIS ALBA subspp. 



Guam Island: Ritidian Point — i male, i female, May 29; Mount 

 Santa Rosa — i female, June 23 ; Tumon Bay — i male, i female, June 

 8; Pagat Point — i female, July 10; Oca Point — i female, May 23; 

 Agaiia Swamp — i male, i female, June 15 ; Ylig Bay — i male, August 

 27; Talofofo Bay — 5 males, June 14; Agfayan Bay — i male, June 6; 

 Port Ajayan— I female, June 18. Rota Island : Sosan Isthmus— 

 2 males, October 19, 25. Ulithi Atoll : Bulubul Island— i nestling, 

 August 21 ; Mangejang Island — i male, August 20; Potangeras 

 Island — 7 males, 3 females, August 14, 15, 16. Palau Islands (Peleliu 

 Island) : Southeastern Peninsula — i juvenile male, September i. 

 Truk Islands: Moen Island — i juvenile male, December 13. 



White terns collected in Micronesia have been compared with speci- 

 mens from the Mariana Islands, the Hawaiian Islands, and Wake 

 Island at the United States National Museum through the courtesy 

 of Dr. Alexander Wetmore and with 17 birds from the Caroline 

 Islands at the American Museum of Natural History through the 

 courtesy of Dr. Robert Cushman Murphy. The measurements of 

 these birds are as follows : 



Males Wing Exposed culnien 



14 adults (Hawaiians) 226-246 (235) 35-39 {Z7) 



4 adults (Wake) 232-242 (236) 37-39 (38) 



14 adults (Marianas) 227-242 (238) 37-40 (39) 



15 adults (Carolines) 237-252 (246) 37-44 (42) 



Females Wing Exposed culmen 



13 adults (Hawaiians) 217-243 (232) 33-39 (36) 



6 adults (Wake) 230-243 (236) 36-41 (38) 



9 adults (Marianas) 228-240 (234) 36-40 (38) 



II adults (Carolines) 234-248 (242) 37-43 (41) 



The latest treatment of Gygis alba (Peters, Checklist Birds of the 

 World, vol. 2, 1934, p. 348-349) refers the Hawaiian birds to G. a. 

 rothschildi Hartert and the Central Pacific birds to G. a. Candida 

 (Gmelin) — except birds from the Marquesas Islands, G. a. micro- 

 rhyncha Saunders. The Japanese checklist for 1942 (p. 219) places 

 the birds from Wake Island in G. a. Candida. On the basis of the 



