Birds of Celebes: Sylviidae. 527 



of the two forms should be made before their distiuction as species is admitted. 

 Cabanis (1) held them to be identical. Taczanowski (h 2) has recently- 

 separated a third form , L. pleskei from C'orea , which is said to differ from 

 L.ochotensis in being larger, having a much longer bill, a longer tail, and the 

 feathers of the back and head uniform without a trace of a darker centre. 

 What this bird is we do not know, but it is of course a migrant occurring in 

 southern localities in winter. 



GENUS PHYLLOSCOPUS Boie. 



The Willow-warblers are generally smaller than the Reed-warblers, have the 

 tail of 12 feathers square, the tarsus not scutellated, the feathers of the fore- 

 head at the base of the bill, as is shown by Gates, disintegrated and velvety, 

 with a few hairs directed forwards. The bill is slightly notched, somewhat weaker 

 and flatter than in Acrocephalus, the culmen about as long as the cranium. The 

 first primary is minute, the second very long, the third and fourth longest. 

 The nest is domed, placed on or near the ground; the eggs white, prettily 

 spotted. 



A Palaearctic genus, migrating south in winter. 



-^ 218. PHYLLOSCOPUS BOREALIS (Bias.). 



Arctic Willow-warbler. 



a. PhyUopneuste javanica (1) Bp. (nee Horsf.), Oonsp. 1850, I, 290; (2) Salvad., Cat. 



Ucc. Borneo 1874, 244. 



b. Sylvia (PhyUopneuste) eversmanni (I) Midd. (nee Bp.), Sib. Eeise, Yog. 1853, 178, t. XVI, 



f. L 2, 3 A. 



c. PhyUopneuste borealis (1) J. H. Bias., Naiimannia 1858, 313; (II) id., in Naiuu. Vog. 



Deutsehl. XHI, 69, t. 375, f. 1; (3) id., Ibis 1859, 459; 1862, 68—70; (4) Swinh., 

 P. Z. S. 1871, 356; (5) Tristr., Ibis 1871, 231; (6) Tacz., J. f. 0. 1872, 35S; 

 (7) id., ib. 1874, 328, 335; (8) Wald., Ibis 1874, 140; (9) Swinh., t. c. 440; (lOj 

 Brooks, t. c. 459; (11) Taez., J. f. O. 1875, 245; (12) Meves, t. c. 429; (13) David 

 & Oust., Ois. Cliine 1877, 271; (14) Pryer, Eowley's Orn. Msc. 1877, H, 171; 

 (15) Taez., P. Z. S. 1887, 602; (16) id., ib. 1888, 463; (17) id., Faune Orn. Sib. 

 Orient. 1891, I, 254. 



d. Phylloscopus sylvicultrix (1) Swinh., Ibis 1860, 53. 



e. Sylvia flavescens (1) Gray, P. Z. S. 1860, 349. 



/: PhyUopneuste kennicotti (I) Baird, Tr. Chicago Ac. Se. I, 1869, 313, pi. 30, f. 2. 



Phylloscopus borealis (1) Cordeaux, Ibis 1875, 179; (2) Seeb. & H. Brown, PMs 1876, 216; 

 (3) Oollett, P. Z. S. 1877, 43—47; (4) Wald., t. c. 697, 762; (5) id., ib. 1878, 

 342, 950; (6) Hume & Davis., Str. F. 1878, VI, 353; (VII) Dresser, B. Em-. U, 

 510, pi. 79 (1878); (8) Wardl Rams., P. Z. S. 1880, 14; (9) Salvad., Orn. Pap. 

 n, 1881, 42S; (10) Seeb., Cat. B., V, 1881, 40; (11) id.. Ibis 1882, 375; (12) Severtz., 

 Ibis 1883, 66; (13) Oates, B. Brit. Burmah 1883,1,77; (14) Meyer, Isis, Dresden 

 1884, 47; (15) Pleske, Bull Ae. Sc. Petersb. 1884, 129; (16) Matschie & Ziemer, 



