568 MANUAL OF PHILIPPINE BIRDS. 
gray ; a distinct line over lores, eye, and ear-eoverts ashy gray; lores and 
upper ear-coverts dusky; chin and fore throat white, becoming ashy or 
drab-gray on cheeks, ear-coverigg®ides of throat, and breast; breast ashy 
gray, becoming white on middle of abdomen; sides, flanks, and thighs 
light olive-brown; crissum yellowish olive-brown. Wing, 76; tail, 68; 
outermost rectrix, 45; culmen from base, 20; bill from nostril, 11; tarsus, 
26; middle toe with claw, 24. 
In winter the upper parts, especially the head, are lighter; the 
superciliary stripe, cheeks, and under parts are washed with buff and the 
gray is entirely obscured. The male and female are very similar if not 
identical in colors. A female from Calayan in fresh winter-plumage 
measures: Wing, 72; tail, 66; culmen from base, 19; bill from nostril. 
11; tarsus, 26. A female in somewhat worn plumage, wing, 72; tail, 68; 
culmen from base, 19; bill from nostril, 11; tarsus, 25. 
549. LOCUSTELLA OCHOTENSIS (Middendorf). 
YELLOW GRASSHOPPER WARBLER, 
Sylvia (Locustella) ochot@nsis MIpDENDORF, Sib. Reise (1853), 2, 185. 
Locustella ochotensis SEEBOHM, Cat. Birds Brit. Mus. (1881), 5, 113; 
WHITEHEAD, Ibis (1899), 210 (migration) ; SHARPE, Hand-List (1903), 
4, 186; McGrecor and WorcEsTER, Hand-List (1906), 87. 
Basilan (McGregor); Batan (McGregor); Bohol (McGregor); Calayan (Me- 
Gregor) ; Luzon (McGregor) ; Marinduque (Steere Exp.) ; Mindanao (Goodfellow) ;, 
Mindoro (Whitehead); Romblon, (McGregor). SKurile Islands, northeastern 
Siberia, Greater Sunda Islands, Kamtchatka, Japan; Borneo in winter. 
A dult.—Above russet-brown; feathers of head and back with darker 
centers; lores and a line over eye to nape ashy; cheeks and ear-coverts 
brown with a buff wash; jaws white; loral and -malar feathers with 
shafts extending beyond the webs, the produced portions black; sides of 
‘the neck brown; under parts white; sides, flanks, thighs, and crissum 
buffy brown; a faint buff wash across fore breast ; wings and tail similar 
to the back, the latter with obsolete, narrow bars on upper surface; 
rectrices dark gray below, each with a dark bar just anterior to the 
whitish tip. Upper mandible dusky, lower mandible light flesh-color, 
dusky at tip; legs and nails pale flesh-color. Length, about 165; male, 
wing, 74; tail, 60; culmen from base, 16; bill from nostril, 9; tarsus, 245 
middle toe with claw, 23. Female, wing, 65; tail, 54; culmen from base, 
15; bill from nostril, 9; tarsus, 22; middle toe with claw, 21. 
Young.—In young birds the sides of the head and the entire under 
parts are strongly suffused with yellowish buff. 
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