NATURAL SCIENCES OP PHILADELPHIA. 345 



14. ^[ F. gallinarius, the hen hawk. 



15. ^[ F. pullarius, the chicken hawk. 



16. * F. coluinbarius, the pidgeon hawk. 



17. ^[ F. niger, the black hawk. . 



18. * F. ranivorus, the marsh hawk. 



19. * F. sparverius, the least hawk or sparrow hawk. 



(a) 



20. || Falco furcatus, the forked tail hawk, or kite. 



21. || F. glaucus, the sharp winged hawk, of a pale sky-blue colour, 



the tip of the wings black. 



22. || F. subcerulius, the sharp winged hawk, of a dark or dusky 



blue colour. 



23. || Psitticus Caroliniensis, the parrot of Carolina, or parrakeet. 



14, 15. Neither determinable. May be young of No. 13, or some other 

 Buteo, or Accipiter cooperi. 



16. Falco columbarius. 



17. Archibuteo sanctijohannis. (A. lagopus, auct. Amer. ) 



18. Circus hudsonius. 



19. Falco sparverius. 



20. Elanoides forficatus ; F. furcatus, Linn., 1766; F. forficatus, 

 Linn., 1758; Nauclerus furcatus, Vig. ; Nauclerus forficatus, Ridgw., 1874. 



21. Elanus GLAUCUS (Bartr.) ! The description, the ascribed habitat, 

 together with the note of form and habit respecting this species and Nos. 

 20, 22, and their allocation together under Milvus, leave no doubt whatever 

 of Bartram's meaning. This then is the bird commonly known as Elanus 

 leucurus, after Temminck, over which name glaucus has tenable priority. 



22. Ictinia SUBC^ERULEA (Bartr.) ! The same complete identifica- 

 tion obtains in this case as in that of No. 21. The nomenclature is strictly 

 binomial, the description accurate as far as it goes, the habitat correctly 

 given, and the additional evidence irrefragable. The bird is that subse- 

 quently described by Wilson as Falco mississippiensis, and commonly 

 known as Ictinia mississippiensis, which specific name must give way to 

 Bartram's. 



23. Conurus carolinensis. Further account, p. 301. 



[(a) Bartram ranges the next three species under a separate subhead, 

 "Milvus. Kite Hawk." And says in a footnote : " Kite Hawks. These 

 are characterised by having long sharp pointed wings, being of swift flight, 

 sailing without flapping their wings, lean light bodies, and feeding out of 

 their claws on the wing, as they gently sail round and round" a very good 

 diagnosis of a milvine bird.] 

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