the Lower Yangtse Basin. 343 



60. MoTACiLLA OCULARIS, Swinhoe. 



(432.) A partial migrant. A good number spend the 

 •v^'inter in the district, and possibly a few remain to breed. 

 From March to May it is very abundant, and again in 

 October. They moult in March and are in full breeding- 

 plumage by the latter half of April. 



61. MOTACILLA LUGENS, KittlitZ. 



(433.) Motacilla japonica, Swinhoe, P. Z. S. 1871, 

 p. 364. 



Arrives in November and leaves in April, some remaining 

 all winter. 



62. Motacilla melanope, Pall. 



(436.) Arrives at the end of March and remains until 

 May, returning again early in September. Frequents the 

 clear shallow streams at the bases of hills, and is seldom seen 

 on the muddy plains. 



63. Motacilla borealis, Sand. 



(439.) Budytes cinereocapillus, Swinhoe, 1871, p. 364. 



Enormous flocks pass through at the end of April and 

 during May, setthng on the grassy plains where water is 

 abundant. A large series out of these flocks show a gradual 

 passage from the typical M, borealis, with dark head and no 

 eye-stripe, to the typical M. flava, with paler blue head and a 

 very distinct stripe ; the blue of the head, however, is never 

 quite so pale as in European examples. All the specimens 

 examined have a yellow throat and white chin, not a white 

 throat as in M. cinereicapilla. In autumn large flocks of 

 immature birds arrive in September and October, but with 

 the exception of one or two obtained in October and No- 

 vember the adults do not travel by this route. 



64. Motacilla flava, Linn. 



(437.) As mentioned above, this species is found among 

 flocks of M. borealis in about equal numbers. 



65. Motacilla taivana (SM'inlioe). 



(438.) Passes through at the same time, but is very 

 much scarcer. 



