Birds of Celebes: Sj'lviidae. 529 



Andamans (Wardl. Ramsay c 8); Tenasseriui (Davison 6, hi); Cochin Cliina 

 (Tiraud 13); Malacca (Maingay FIT, 5); Natima Is. (Everett 35, Hose 36); 

 Sumatra (Bock <5, Modigliani 26); Nias (Kannegieter 41); Philippines (Everett 

 4, 5, Steere 22, Platen 20, Whitehead 24, Bourns & Worcester 34); Borneo 

 (Doria & Beccari a 2, etc. 21); Talaut — Kabruang and Karkellang (Nat. Coll. 

 .35); Great Sangi (Meyer 14, 20); Celebes (Meyer in Dresd. Mus.) — Minahassa 

 (Sarasin Coll. 39), Mount Bonthain (Everett iO); Saleyer and Kalao (Everett 40); 

 Morty (Wallace 10); Halmahera (Wallace .iO); Ternate (Wallace, Beccari 5, 10, 

 Fischer 15); Batcliian (Wallace 9, 10); Burn (Bruijn 9); Amboina (Beccari 9); 

 Flores (Wallace 9, 10, Weber 31); Timor (Wallace ,9, 10); Bah, Simibawa and 

 Sumba (Doherty 40). 



The breeding-grounds of the Arctic Willow-warbler are in Siberia, where 

 its nest has been found by Seebohm 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 migration 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 (c 4), 

 Styan (27) and De I^a 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 arrival 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 15 gr., and its migration in some 

 cases passing over 5000 miles. What becomes of the birds 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 (Gatke, Vogelwarte 1891, 308), it has 

 never been met with in Central or Southern Europe, and Menzbier expresses 

 the opinion (Zugstr. d. Vog. im eur. Russland 1886, 47; 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. horealis seem to be P. xanthodryas Swinh., occur- 

 ring with it in China and Japan and known to occur in winter in Borneo, and 



Mejer k Wi g 1 ps w ..r th, Birds of Celelies (Nov. ir.th, ls<l7). 67 



