TOWNSEND AND WETMORE: THE BIRDS. 185 



Islands, collected 22 September, 1899. From lack of material for 

 comparison it is not possible to assign a subspecific name to this bird. 

 According to Mathews (Birds of Australia, 1912, 2, pt. 4, p. 431), 

 specimens from the Paumotu, Marquesas, and Society Islands should 

 be called Procelsterna ccrulca teretirostris (Laf resnay e) . 



26. Gygis alba pacifica (Lesson). 



Sterna pacifica Lesson, Ann. sci. nat., 182.5, 4, p. 101. (Society Islands, 

 Paumotu Islands, and Bora Bora). 



Three specimens were taken, a female at Tekokoto, 26 October, 

 1899, and two males at Akiaki, Paumotu Islands, 30 October, 1899. 

 Measurements of the specimens follow : — 



No. Sex Locality Wing Tail Culmen Tarsus 



M. C. Z. 81,929 



(U.S. N.M. 212,1.52) cf Akiaki, Pau- 30 Oct., 



motu Islands 1899 249.0 124.0 40.2 1.3.8 



'212,153 c? Akiaki, Pau- 30 Oct., 



motu Islands 1899 243.0 127.5 41.0 13.0 



" 212,154 9 Tekokoto.Pau- 26 Oct., 



motu Islands 1899 243.0 117.0 40.0 13.5 



27. Gygis microrhyncha Saunders. 



Gygis microrhyncha Saunders, Proc. Zool. soc. London, 1876, p. 668. (Marque- 

 sas Group). 



Four specimens were collected of which three, a male, a female, and 

 an alcoholic specimen whose sex is not known at present were taken 

 at Nukuhiva, Marquesas Islands, on 16 September, 1899. The fourth 

 is a mummy that probably should bear the same date. These birds 

 differ from the original description in having the shafts of the rectrices 

 blackish (not entirely white). In addition the second rectrix is the 

 longest instead of the third as is stated by Saunders. The black eye 

 ring is more distinct than in specimens of Gygis alba. 



28. Sterna lunata Peale. 



Sterna lunata Peale, U. S. explor. Exped., 1848, 8, p. 277. (Vincennes Island, 

 Paumotu Group). 



One specimen, an immature bird, was collected at Rangiroa, 

 Paumotu Islands, 23 September, 1899. 



