186 PROCEEDINGS OF THE ACADEMY OF [April, 



Cotyle ranicorensis Boie, Isis, 1844, p. 170 (nom. emend, pro Hirundo vani- 



korensis Quoy and Gaimard). 

 Hemiprocne salangana Streubel, Isis, 1848, p. 368 (East Indies). 

 Cypsehis inquietus Kittlitz, Denlvwurd. Reise, II, 1858, p. 26 (Ualan Island, 



Caroline Islands, Pacific Ocean). 



Chars, subsp. — Similar to Collocalia leucophaea, but decidedly smaller; 

 tarsus sparsely feathered ; bases of the loral feathers pure white ; upper 

 parts very much more blackish, and rather more uniform, the rump 

 not appreciably lighter than the back. 



Type locality. — Java. 



Geographical distribution. — East India Islands and western Poly- 

 nesia, from Nias, Java, Borneo, and the Natuna Islands, northeast 

 to the Philippine, Mariana, and Caroline Islands, east and southeast 

 to New Guinea, Duke of York Island, Tonga (Friendly) and Loyalty 

 Islands. 



The birds of a good series, consisting of specimens from Java, the 

 Philippine and Caroline Islands, and from Nias Island, off the western 

 coast of Sumatra, are very uniform in size as well as in the dark lower 

 surface and glossy blackish upper parts, indicating thus that the name 

 Hirundo vanikorensis Quoy and Gaimard,^" which was based on the 

 bird from the Santa Cruz Islands, is synonymous with Hirundo fuci- 

 phaga Thunberg,^^ from Java. A single specimen from Guam Island 

 is, however, much more brownish above than any of the others ex- 

 amined, and may represent an und escribed race. Much of the difficulty 

 heretofore experienced in identifying this species and in segregating 

 its various forms has arisen from confusing with it the birds with light 

 lower surface and unfeathered tarsi, which occur in various localities, 

 and most if not all of which are Collocalia unicolor amelis. 



The tail in Collocalia fuciphaga is usually quite deeply emarginate, 

 but this character varies greatly. Some specimens in our series have 

 the tail almost even, and there is every gradation evident between 

 this condition and that of greatest emargination, differences apparently 

 to be accounted for only by individual variation. Care must therefore 

 be exercised in using the shape of the tail as an absolute character to 

 distinguish this species. 



Measurements of Collocalia fuciphaga fuciphaga are as follows: 



»" Voy. Astrolabe, Zool., I, 1830, p. 206, pi. XII, fig. 3. 



" K. Vet. Akad. Nya Handl., XXXIII, 1812, p. 153, pi. 4. 



