40 



NOMENCLATURE OF BIRDS. 



6. Nauclerus. 



a. Nauclerus, Vigors, 1825. 

 Elanoides. G. R. Gr. 



178, Nauclerus furcatus. B. M. 



Falco furcatus, L. Wils, Amer. Orn.pl. 51, f. 2. Gould, B. of 

 Eur. pi. 30. Shaw, Nat. Misc. pi. 204. El an us furcatus, Cuv. 

 Elanoides furcatus et E. yetapa, Vieill. Nauclerus furcatus, 

 Vigors. Milvus furcatus, Vieill. Ois. de I' Amer. Sept. t. 10. 

 Yarr. Brit. B. 2 edit. i. fig. p. 77. 



England ! S. America and Southern parts of N. America. 



b. Chelidopteryx, Kaup, 1843. 

 Chelictinia, Less. 1843. 



179. Nauclerus Riocourl B. M. 



Elanoides Riocouri, Vieill. Gal. des Ois. t. 16. Falco Rio- 

 courii, PI. col. 85. Elan us Riocouri, Cuv. Nauclerus Rio- 

 couri, Vigors. Nauclerus african us, Siv. Chelictinia Riocourii, 

 Less. Nauclerus (Chelidopteryx) Riocouri, Kaup. 



W. Africa. 



7. ICTINIA. 

 a. Ictinia, Vieill. 1816. 



180. ICTINIA MISSISSIPPENSIS. B. M. 



Falco mississippensis, Wils. Amer. Orn. pi. 25, f. 1. Milvus 

 mississippensis, Cuv. Ictinia mississippensis, Kaup. I. ophi- 

 ophaga, Vieill. Nertus mississippensis, Boie. 



Sou them parts of N. America. 



b. Nertus, Boie, 1828. 



Pcecilopteryx, Kaup, 1843. 



181. Ictinia plumbea. B. M. 



Falco plumbea, Gm. PL col. 180. Ictinea plumbea, Vieill. 

 Milvus cenchris, Vieill. Ois. de V Amer. Sept. t. 10, bis. Nertus 

 plumbeus, Boie. Buteo plumbeus, Cuv. Ictinia (Pcecilop- 

 teryx) plumbea, Kaup. Spix, Av. Bras. t. 8. 



South America, (Brazil, Guiana) and Mexico. 



