Aves. 41 



10. Calidris arenaria. 



Calidris arenaria (L.), Sharpe, Cat. B. Brit. Mus., xxiv, p. 526 (1896). 



An adult bird in moult, still retaining a few of the feathers of 

 the summer plumage on the back. This is an interesting adtlition 

 to the Avifauna of Christmas Island, and increases our knowledge 

 of the line of migration pursued by the Sanderling, which has in 

 recent 5'ears been discovered in North Australia and in the Malay 

 Archipelago. 



11. Limonites ruficollis. 



Limonites rifjicollii (Pall.), Shai-pe, Cat. B. Brit. Mus., xxiv, p. 545 (1896); 

 id., Haiidl. B., i, p. 163 (1899). 



a, h, (J juv., 9 j^^'^'- Flying Fish Cove, September 20, 1897. 



Both these specimens are immature birds in their first winter 

 plumage. The male has the wing 4*15 inches and the female 4*0. 

 The species has not been met with before on Christmas Island, but 

 is doubtless a regular visitor on migi'ation. 



12. Gallinago stenura. 



Gallinago stenura, Bp. : Sharpe, Cat. B. Brit. Mus., xxiv, p. 619 (1896) ; id., 

 Handl. B., i, p. 165 (1899). 



«, c? ad. Flying Fish Cove, December 1, 1897. 

 Not previously recorded from Christmas Island. 



Order ARDEIFORMES. 

 13. Demiegretta sacra. 



Ardea jugularis, Wagl. : Sharpe, P.Z.S., 1889, p. 516; Lister, P.Z.S., 1888, 



p. 138. 

 Demiegretta sacra (Gni.), Sharpe, Cat. B. Brit. Mus., xxvi, p. 138 (1898) ; id., 



Handl. B., i, p. 198 (1899). 



^T^ g ( ad. Flying Fish Cove, July, 1897. 



( ad. [white phase]. 

 Nos. 2, 4, (jlmm. Flying Fish Cove, August, 1897. 

 No. 3, ad. [white phase]. 

 «, (J ad. Flying Fish Cove. November 18, 1897. 



The bird in the white phase of plumage has verj" little crest, 

 but the long ornamental breast-plumes are fully developed. Two 

 of the outer scapulars are grey externally, and another grey plume 

 is concealed by the long ornamental feathers of the lower back. 



