76 PASSERES. 



Eggs of Cettia cantans from Yokohama in the Pryer collection are 

 uniform brick -red in colour, and very closely resemble eggs of Cettia 

 cetti from South Europe, of Cettia canturians from Lake Kiukiang 

 in Central China, and of Cettia fortipes from India. 



45. CETTIA CANTILLANS. 



(SMALL JAPANESE BUSH-WARBLER.) 



Salicaria cantillans, Temminck and Schlegel, Fauna Japonica, Aves, p. 62 

 (1847). 



The Small Japanese Bush-Warbler differs from its larger ally only 

 in size (wing from carpal joint 2"3 to 2'1 inches). 



Figures : Temminck and Schlegel, Fauna Japonica, Aves, pi. 20. 



The Small Japanese Bush- Warbler is a summer visitor to Yezzo, 

 but is a resident in Soutbem Japan. It is common in the plantations 

 at Hakodadi ( Whitely, Ibis, 1867, p. 197) ; there are six examples in 

 the Pryer collection from Yokohama, and four from the central 

 group of the Loo-Choo Islands. 



It does not differ in colour from tbe larger species ; and in both 

 the tail, when in perfect condition, is slightly longer than the 

 wing. 



It is somewhat remarkable that two species so nearly allied should 

 have precisely the same geographical distribution, but this apparently 

 anomalous fact is capable of explanation. The large species (wing 

 2'8 to 2'5 inches) is probably the result of an emigration to Yezzo of 

 a party of Cettia canturians, which breeds in the valley of the Ussuri, 

 the island of Askold, and North China, and winters in South China 

 and Formosa. The Chinese Bush- Warbler is slightly larger than its 

 Japanese ally (wing 3"1 to 2'8 inches) ; its tail is proportionately 

 shorter, and its colour is more russet, especially on the crown. The 

 small species (wing 23 to 2-1 inches) is probably the result of an 

 emigration of a party of Cettia minuta, which reached Southern 

 Japan via Formosa and the Loo-Choo Islands. The Hainan Bush- 

 Warbler is a resident in South China and Hainan, and is represented 

 on the island of Formosa by intermediate forms (wing 2'56 to 2'35 

 inches) which intergrade in colour with both forms. To explain the 

 present condition of these closely allied species, it is necessary to 

 assume, first, that the two emigrating colonies increased and spread, 

 the one northwards and the other southwards, until they both ranged 



