143 



INSECTIVORtE. 



Family MOTACILLID^. 



Genus MoTACiLLA. f Latham. J 



GREY-HEADED YELLOW WAGTAIL. 



Motacilla Jlava, f Lin, nee Ray. J Var. Cinereo-capilla. 



Motacilla cinereo-capilla, Savi; Orn. Tosc. iii, p. 216. 



" " " Bonaparte; Icon. d. Faun. 



ItaL, pi. 31, f. 2. 

 " " Degland. Dubois. 



" " Cabanis. 



" " Selts-Longchamps. 



Jlava cinereo-capilla, Schlegel; Revue. 



Feldeggi, Michaellis. 



Dalmatica, Betjch. 



Bergeronnette de printems a tete grise, Of the Feench. 

 GrauJcopJige gelhe Schafstelze, Oe the GtEEMans. 



_ Specific Characters. — Feathers of the back and rump olive green; 

 throat white. No white or yellow stripe over the eye. All the 

 rest as in M. Jlava. Length about six inches. 



Nothing can better illustrate the difficulties which at- 

 tend the determinlation of species when slight alterations 

 in colour are taken as sufficiently distinctive, than this and 

 the following bird. As Dr. Zander has well remarked, 

 we find the two ends of the series of varieties, and 



