14 BULLETIN 292, U. S. DEPARTMENT OF AGBICULTUKE. 
June 2S to July 30. and in 1863 as early as June 26 MaeFarlane : 
St. Michael. Alaska. June 16. 1SS0 (Nelson) : and at the mouth of the 
Kowak River, Alaska, June 17. 1S99 (Grhmell . 
Fall migration. — The regular disappearance of the long-tailed jaeger 
from its breeding grounds takes place in August and September. 
The last was noted at Fort Conger. August 30. 1882 Greeley", and at 
Point Barrow. August 12. 1SS3 Murdoch). A few individuals pass 
south along both coasts of North America before they cross the ocean 
to their winter homes. On the Atlantic side they hare been noted 
on Anticosti Island, in August. 1900 (Schmitt); West Castleton, Vt.. 
about September 7. 1S77 (Howe); Woods Hole. Mass.. August 12. 
18SS. September 10-22. 1906. and October 13. 1894 (Edwards);- on 
Georges Bank, off Massachusetts, not rare in fall Collins' 1 : Monomoy 
Island. Mass.. September 29. 1885 Cahoon); Wallingford, Conn., 
August 30. 1S73 (Merriam); once on Long Island. X. Y., in fall 
(Lawrence^: and once at Cape Canaveral. Fla. (Cory). The Pacific 
slope records are: Okanogan Landing. British Columbia. August 30, 
1905. and September IS. 1911 'Brooks': Chilliwack. British Colum- 
bia. August 23 and September 7. 1SS9 'Brooks' : near Monterey. CaL. 
August 23. 1S94 (J~ ooinis : and Pacific Beach. CaL. September 19. 
1904 (Bishop). 
The species has occurred casually in the interior at San Sault Rapid, 
Mackenzie. June 19. 1904 (Preble); near Winnipeg, Manitoba. Sep- 
tember. 1S96 (Seton), and October S. 1902 (Atkinson); Southampton 
Island. Keewatin, August 17. 1S21 Saunders'-, near Cairo. 111.. Xo- 
vernber. 1S76 (Ridgway); and at Lone Tree, near Iowa City. Iowa. 
June 15. 1907 (Anderson). 
ITOKY GULL. Pagophila alba CGtooteeus). 
Range. — Arctic seas, wintering hi high latitudes in the Eastern 
Hemisphere south to France. 
Breeding range. — The principal summer home of the ivory gull 
includes the Ait tic islands of the Eastern Hemisphere. Here it is 
abundant, in many places outnumbering all other gulls combined, and 
has been noted north to latitude S5 = . It is abundant also as a breeder 
in the extreme northwestern part of Greenland, from Thank God 
Harbor (Bessels) to Rensselaer Bay (Kane), throughout Ellesmere 
Island, and south to the northern part of Baffin Land at Port Bowen 
(Parry). To the westward it is much less common but has been 
found breeding west to Whiter Harbor (Parry) and to the north- 
eastern part of Prince Patrick Island (M'Chntock). 
Winter range. — In the Eastern Hemisphere the ivory gull winters 
just to the southward of its summer home, and ranges thence south 
to France. It withdraws almost entirely at this season from the 
Western Hemisphere, except for an occasional bird that remains near 
