FALCONIDiE. 



67 



The following list, extracted from Latham's Index Ornithologicus , contains the 

 species said by that author to be inhabitants of North America : — 



Sp. 3. 



Falco melanseetus. 



4. 



)» 



fulvus. 



5. 



»» 



leucocephalus, 



7. 



>> 



ossifragus. 



8. 



j> 



leucogaster. 



12. 



»> 



Americanus. 



17. 



»j 



candidus. 



30. 



»> 



haliseetus. 



31. 



91 



Leverianus. 



33. 



99 



lagopus. 



41. 



19 



furcatus. 



47. 



99 



buteo, var. j3. 



48. 



99 



variegatus. 



49. 



99 



borealis. 



57. 



99 



spadiceus. 



58. 



99 



lineatus. 



59. 



99 



rusticolus. 



Sp. 61. 



Falco obsoletus. 



65. 



99 



palumbarius. 



66. 



99 



gentilis. 



69. 



99 



Islandicus. 



72. 



99 



peregrinus. 



74. 



99 



Sancti Johannis. 



75. 



99 



sacer. 



76. 



99 



Novae terrae. 



78. 



99 



hyemalis. 



94. 



9> 



cyaneus, /3. 



95. 



99 



uliginosus. 



99. 



99 



sparverius. 



103. 



99 



fuscus. 



104. 



99 



dubius. 



105. 



99 



obscurus. 



106. 



99 



columbarius. 



Suppl. 



99 



hyemalis, var. 



The subjoined wood-cuts are intended to illustrate the forms of the bills in 

 some of the genera of the Falconidae. 



FALCO ^ESALON. 



The bill of the Merlin, here represented, is short, strong, wide at the base, and gradually 

 becoming more and more compressed towards its tip, which forms an acute hook, that curves 

 down over the end of the lower mandible. The curve of the ridge from the cere to the tip 

 is about the quadrant of a circle, having nearly the third of an inch radius. The ridge of the 



K 2 



