LIST OF BIURNAL BIRDS OP PREY. 



25 



' As to the several species here numbered 4, 4a!, 5, 6, and 7 (and the synonyms of 

 some of them) see Appendix B, where I have treated M. leucauchen as a synonym of 

 M. ri(ficollis ; M. concentricus and M. jxlzelni I have treated as synonyms of M. gilvi- 

 collis. 



2 Temminck's plates are severally entitled " Falco xanthothorax " and "Falco leu- 

 cauchen." 



^ Described by D'Orbigny under the title of " Nisus concentricus." 



■* Mr. Sharpe treats G. gracilis and G. cmrulescens as belonging to the same species ; 

 but they appear to me to be distinct. G. gracilis is the "'Aplomado" of Azara, and 

 G. cisrulescens is the " Falco hemidacfylus '' of Temminck ; G. gracilis is the more 

 Eastern, G. carulescens the more Western species, both being South-American. 



E 



