Birds of Celebes: Sylviidae. 
529 
Andamans (Wardl. Eainsay c S); Tenasserim (Davison 6, hi)-, Ooclun China 
(Tii’aud 13 )\ Malacca (Maingay VII, 5); Natuna Is. (Everett 35 , Hose 36 )-, 
Sumatra (Bock 8 , Modigliani 26 )-, Nias (Kannegieter 4i); Philippines (Everett 
4 , 0 , Steere 22 , Platen 20 , Whitehead 24 , Bourns & Worcester 54); Borneo 
(Doria & Beccari a 2, etc. 2J)] Talaut — Kahruang and Karkellang (Nat. Coll. 
55); Great Sangi (Meyer 14 , 20 ]-, Celebes (Meyer in Dresd. Mus.) — Minahassa 
(Sarasin Coll. 39 ], Mount Bonthain (Everett 40); Saleyer and Kalao (Everett 40); 
Morty (Wallace 40); Halmahera (Wallace 40); Ternate (Wallace, Beccari 0, 40, 
Fischer 45); Batcliian (Wallace .9, 40); Biun (Bruijn .9); Amhoina (Beccari .9); 
Flores (Wallace 9 , 10 , Weber 54); Timor (Wallace .9, 70); Bali, Sumha-wa and 
Sumha (Doherty 40 ). 
'rhe breeding-grounds of the Arctic Willow-warbler are in Siberia, where 
its nest has been found by Seebohna and by Dybowski and Godlewski, and 
in 1876 it was discovered nesting also in northern Norway by Prof. Collett. 
As it has been met with in summer in a number of localities between Norway 
and Alaska, it would seem likely that it breeds in all suitable spots between 
these widely separated countries. During the periods of migxation its numbers 
increase, as Godlewski says in Taczanowski’s work (c 17), in S.E. Siberia — 
Baikal and Dauria — to such an extent that the bird is to be found in nearly 
every bush. Further south in Corea Kalinowski found it common only on 
migration in spring and autumn and rare in summer; somewhat the same con- 
dition seems to obtain in North China, though the Abbe David remarks that 
a large number remain to breed; in Central and South China Swinhoe (c4), 
Styan (27) and De La Touche (29) met with it, however, only during its 
spring and autumn transit between its summer and winter quarters; at these 
times it passes through the country in abundance. It arrives in Southern Pegu 
and Tenasserim. as Mr. Oates observes (hi, 13), about the middle of September, 
and winters there. Its date of an-ival in Palawan is given by Mr. Whitehead 
(24) as about September 16*'', and the dates of specimens killed in the East 
India Islands prove that it is present here between September and May. In 
the autumn of 1896 no fewer than 25 examples were collected by our hunters 
in the largest island of the Talaut Group, Karkellang. 
For its size the Arctic Willow -warbler is certainly one of the most re- 
markable of migrants, its weight being less than 1 5 gr., and its migration in some 
cases passing over 5000 miles. What becomes of the biids which nest in Norway 
and North Russia is not known, for, except that a single specimen has been 
killed and a second seen in Heligoland t^Gatke, Vogelwarte 1891, 308), it has 
never been met with in Central or Southern Europe, and Menzbiei expresses 
the opinion (Zugstr. d. Vog. im eur. Russland 1886, 4/, Tacz. c 17) that the 
migration takes place from west to east and east to west, till the European birds 
join the Asiatic ones at the Ural mountains. 
The nearest allies of P. borealis seem to be P. coanthodryas Swinh., occur- 
ring with it in China and Japan and known to occur in winter in Borneo, and 
Meyer k Wi gl es wo r th, Birds of Celebes (Not. ISth, 1S!I7). 67 
