Basilan (McGregor); Batan (McGregor); Bohol (McGregor); Calayan (McGregor); Luzon (McGregor); Marinduque (Steere Exp.); Mindanao (Goodfellow); Mindoro (Whitehead); Romblon (McGregor). Kurile Islands, northeastern Siberia, Greater Sunda Islands, Kamtchatka, Japan; Borneo in winter.

Adult.—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, 24; 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.

550. LOCUSTELLA LANCEOLATA (Temminck).
STREAKED GRASSHOPPER WARBLER.

Calayan (McGregor); Luzon (Heriot, McGregor). Russia, Siberia, and central Asia; in winter to China, Andaman Islands, Indian Peninsula, and Burmese provinces.

Adult (sexes similar).—Above olivaceous russet-brown, each feather with a wide seal-brown shaft-streak; primaries and secondaries seal-brown edged with russet-brown, second primary edged with whitish; secondary-coverts similar to back; tail nearly uniform brown; sides of head and ear-coverts brown; a yellowish buff line above, and another below, eye; cheek and jaw buff, traversed by a narrow blackish brown line; under parts whitish, washed with buff on fore breast, sides, flanks, and crissum; feathers of these parts more or less marked with blackish brown shaft-lines. Bill dusky above, flesh-color below; legs and nails pale yellowish flesh-color. Length, 120 to 125. A male from Calayan measures: Wing, 57; tail, 45; culmen from base, 12; bill from nostril, 7; tarsus, 17. A female, wing, 53; tail, 43; culmen from base, 11; bill from nostril, 7; tarsus, 19.

“The streaks on the lower surface become reduced in aged birds. The bird least marked in my series has a few streaks only on the middle of the breast and on the flanks, with one or two faint marks on the under tail-coverts. In this state it is very like the Indian L. straminea. The majority of the birds are densely streaked from the chin to the tail-coverts, except on the abdomen; and all these are characterized by a richer tone of coloring beneath. The tail-coverts vary in the most extraordinary manner. In many of the birds they are entirely unmarked; in others densely streaked, and this apparently quite independently of the amount of streaking on the other parts of the lower plumage.” (Oates.)