EXPLANATION OF THE PLATES. 



Plate I. 



Fig. 1. Diccemn rubro-coronatian. Fig. 2. D. pulchrius. 



From the type specimens in the British Mugeum. 



Plate II. 



Fig. 1. Pholidornis rubrifrons. Fig. 2. Labor nis alexandri. 



From the type specimens in the British Museum. 



Plate III. 



Petrochelidon ruJicoUaris. Adult and young. From specimens sent 



by Prof. Nation of Lima. 



Plate IV. 

 Fig8. 1— J-. Motacilla lugens. 



Fig. 1. Adult male in nearly full summer plumage, the black falling 



short of the chin, and the back mixed with black. 

 Fig. 2. Adult male in fuU summer plumage, with the throat and 



back both entirely black. 

 Fig. 3. Young after first autumn moult. 

 Fig. 4. Adult in full winter plumage, resembling the adult of M. 



ocularis, but distinguished from the latter by its stouter 



bill. 



Figs. 5, G. Motacilla ocidaris. 



Fig. 5. FuU winter plumage. 



Fig. 6. Full summer plumage, showing the black throat with the 

 grey back, which is persistent in this species. 



