12 



ARKIV FÖR ZOOLOGI. BAND 14. NIO 25. 



Heteropygia hairdi 



Querquedula discors 



Nyroca affinis . . 



Buteo sioainsoni 

 » platypterus . 



Elanoides forficatus 



{Asio flammeus) . 



CoccyziLS americanus 



» » occidentalis 



» erythrophthalmus 



Tyranrius tyrannus . . . 



Hirundo erythrogaster . . 



Hylocichla sivainsoni . . 



Dendroeca aestiva .... 

 » blackburniae 



Zamelodia ludoviciana 



Pyranga rubra rubra . . 



Tropical Subtropical Temperate Påramo 



+ 



+ 



+ 



+ 



i- 



This table shows that the greatest number of migrants 

 is to be found in the subtropical and temperate zones, and 

 several of them appear to live just near the boundaries between 

 these two. One species is found in all zones and two in the 

 Påramo and only one is seemingly restricted to the tropical. 

 The small number of migrants from the tropical zone is ex- 

 plained by the fact that only a little coUecting work has been 

 done there in this connection. 



In his work »Étude des oiseaux de TÉquateur » in »Mission 

 d. serv. geogr. pour la mes. d'un are de meridien équatorial 

 en Amerique du Sud», M. Menegaux, 1911, reported about the 

 occurrence of 274 species of birds from Ecuador. With regard 

 to the distribution of the bird-life he recognizes four »zones», 

 but his zoogeographical districts are not the same as those, 

 which we ha ve used above. He speaks about a western and 

 an eastern »tierra caliente», the inter-Andean vallej^, which 

 forms »tierra templada», and finally the »påramo» or »tierra 

 fria». We have on the other hand used the same division into 

 zones as the botanists do, and which is based on the distri- 

 bution of the plant-life, in a similar way as Chapman has done 

 when reporting on the bird-life of Colombia. Although of 

 course Menegaux's enumeration of the species of birds in the 

 different zones according to his system are of great value, 



