100 Dr. E. Hartert on Motacilla subpersonata. 



Text-fig. 9. 



Bead of Motacilla alba alba. r> ad. (spring). 

 Text-fig. 10. 



Head of M. alba subpersonata, 3 ad. (spring). 

 Text-fig. 11. 



Head of M. alba per sonata, d ad. (spring). 



