182 NOVITATES ZOOLOGICAE XXII. 11115. 



1'2. ? ail, Moutefiascone, 15. V. lOiWi. Wing 356 mm. 



I'i. ?, San 8evero di Pnglia, 11. viii. lull. This bird is ia adult plumage, but 

 a few brown feathers (juvenile) remain on wings and back. Wings in full moult. 



14. ? ad., Foggia, 14. ix. 1912. Outermost wing-feathers still growing. 



15. ? , San Nicandro di Pnglia, 4. i. 1910. Head and neck in fresh plumage of 

 adult ; on back and rump a few adult feathers in the juvenile plumage ; underside 

 with longitudinal marks. 



16. S, Terracina, near Rome, 14. .\ii. 191(1. In full moult from juvenile to 

 adult plumage, except on tail and wing. 



17. ?, Canepina, near Viterbo, Middle Italy, 14. iv. 1911. Moult from juvenile 

 to adult plumage beginning on upperside. 



18. (S, Viterbo, November 1910. Like No. 17. Most advanced on head 

 and neck. 



19. 6, Foggia, Puglie, lo. i. 1906. Upperside in moult from juvenile to adult 

 plumage. 



20. (S, Viterbo, Middle Ital)-, 10. xi. 19(i7. Above and below moulting into 

 adult plumage, but less underneath. 



21. ? juv., San Severo, Puglie, lO. iv. 1907. First sign of moult into adult 

 showing on neck and rump. 



22. (S juv., Oriolo Romano, near Rome, In. x. iOOO. 



23. ? juv., Foggia, Pnglie, 10. x. 1907. Moult into adult beginning on back. 



24. ? juv., near Foggia, 14. v. 1908. Monlt on neck. 



25. c? juv., Foggia, 5. v. 1911. Moult beginning on neck and mantle. 



26. ? juv., Terracina, near Rome, lO.iii. 1911, 



27. ? juv., Foggia, December 1910. 



28. ¥ juv., Manfredino, Puglie, January 1911. Upperside moulting into adult. 



29. ? juv., Terracino, near Rome, 11. xii. 1908. Like No. 28. 



30. ? juv., Foggia, January 1913. Little moult on mantle. 



31. ? juv., Apricena, Puglie, 7. viii. 1906. 



32. ? juv., Foggia, Puglie, 2. xii. 1909. 



IV. 



FA LCD CHERRUG. 



I have nothing to add to what I said in Vog. pal. Fatum, pp. 1050-1062, about 

 the " Saker" and its subsjiecies. I consider it to be a totally distinct species, and 

 1 have not been able to convince myself that it " intergrades " with any form of 

 Falco Liftr miens. I call special attention to what I said I.e., p. 1060. 



V. 



THE NORTHERN FALCONS. 



These Falcons surpass the rest in beauty, but also in the difficulty of their 

 elucidation. 



I now distinguish the following forms : 



Falco rusticolus ru.Hficolus: N. Scandinavia to N'orfh Uussia, 

 Falco rusticolus idamlus : Iceland only, 



