584 MANUAL OF PHILIPPINE BIRDS. 



Genus ACANTHOPNEUSTE Blasius, 1858. 



Bill slender and acute, a slight notch near its tip; rictal and nasal 

 bristles short; wing long and pointed; first primary very short, slender 

 and acute, usually little more or less in length than primary-coverts; 

 third and fourth primaries longest; tail moderate in length and square; 

 tarsus and toes slender; bill from nostril less 'than one-half tarsus 

 and equal to hind toe with half its claw; divisions between tarsal 

 scutes obsolete. Upper parts dull olive-green, under parts pale yellow 

 or white. The birds of this genus resemble some of the small flycatchers 

 (Cryptolopha) , but are distinguished by their short first primary. 



Species. 



a 1 . Second primary equal to or greater than the sixth. 



6 1 . First primary shorter, from 7.5 to 11.5 mm. in length, equal to or less than 



the primary-coverts; under parts grayer borealis (p. 534) 



6 2 . First primary longer, from 12.5 to 15 mm. in length, and longer than primary- 



coverts; under parts yellower xanthodryas (p. 585) 



a 2 . Second primaiy equal to or greater than the ninth, and from 17 to 20 mm. in 

 length; under parts grayish yellow lugubris (p. 586) 



568. ACANTHOPNEUSTE BOREALIS (Blasius). 







NORTHERN WILLOW WARBLER. 



Phyllopneuste borealis BLASIUS, Naumania (185S), 313. 



Phylloscopus borealis SEEBOHM. Cjit. P.inls I'.iit. Mus. (1881), 5, 40; WHITE- 

 HEAD, Ibis (1899), 210 (migration). 



Acanthopneuste borealis GATES, Fauna Brit. hid. Bds. (1889), 1, 412; 

 SHARPE, Hand-List (1903), 4, 216; GATES and REID, Cat. Birds' Eggs 

 (1905), 4, 227; MCGREGOR and WORCESTER, Hand-List (1906), 90. 



Balabac (Everett); Bantayan (McGregor); Basilan (McGregor) ; Bohol (Mc- 

 Gregor); Calamianes (Bourns & Worcester, McGregor); Calayan (McGregor); 

 Caluya (Porter) ; Cebu (McGregor); Cuyo ( McGregor ) ; Fuga (McGregor); 

 Guimaras (Bourns d Worcester); Leyte (Everett); Lubing (McGregor); Luzon 

 (Everett, Whitehead, McGregor, Bartsch) ; Maestre de Campo (McGregor & 

 Worcester); Masbate (Steere Exp.) ; Marinduque (Steere Exp.) ; Mindanao 

 (Everett, Steere Exp., Celestino); Mindoro (Downs <C- Worcester, Whitehead, 

 McGregor); Negros ( Whitehead) ; Palawan (Whitehead, Platen, Steere Exp., 

 Bourns & Worcester); Panay (Steere Exp.); Polillo (McGregor) ; Romblon 

 (Bourns & Worcester); Samar (Bourns i( \Vn < tiler) ; Sibuyan (Bourns d 

 Worcester); Siquijor (Celestino); Tablas (Bourns d Worcester); Ticao < 

 Gregor) ; Verde (McGregor). Northern Europe, northern Asin. Alaska, Com- 

 mander Islands; in winter to China, Formosa, Indo-Chinese provinces, Malay 

 Peninsula, and Borneo. 



"Coloration. Upper plumage olive-green, lighter on the rump ; wings 

 brown, the outer webs edged with olive-green ; wing-co verts brown on 

 the inner and olive-green on the outer webs; the median and greater 

 coverts with yellowish white tips forming two bars; tail brown, the 

 outer webs edged with olive-green; a broad and well-defined eye-streik, 

 reaching to the nape, yellowish white; lores brown; ear-coverts olive 



