80 



another line of that colour across the superior part 

 of the wing ; the two middle tail feathers are dusky, 

 deeply margined with rufous brown; the outer fea- 

 thers are white ; the next are white on the exterior 

 web, and a part of the inner web towards the tip ; 

 the shaft is dusky ; the rest are dusky ; the legs are 

 yellowish brown ; the hind claw as long as the toe, 

 and somewhat curved. (Montagu.) 



GENUS XXV. 



MOTACILLA. 



Beak slender, cylindrical, straight, and slightly 

 notched at the tip ; feet simple, 3 toes before, and 

 one behind ; the hinder claw rather long. 



The tail is long, and constantly in motion ; their 

 pace is running, not hopping; their flight undulated. 



They build on the ground. 



1. ALBA. WHITE WAG-TAIL. 



M. pectore nigro, rectricibus duabus lateralibus dimi- 

 diato oblique albis. Shaw. 



The bill is black ; irides hazel ; the head, neck, 

 and part of the breast, the middle tail feathers and 

 legs are black ; the forehead, cheeks, lower part of 

 breast, belly and outermost tail-feathers are white ; 



