236 LLOYDS NATURAL HISTORY. 



Locustclla navt'a, B. O. U. List Br. B., p. 20 (1883) ; Lilford, 

 Col. Fig. Br. B., pt. ix. (iSSS); Saunders, Man., p. 81 

 (1889). 



Adult Male. — General colour above olive-brown, all the 

 feathers centred with dark brown, producing a mottled ap- 

 pearan :e, the markings being smaller on the head, almost 

 :te on the sides of the neck, and not very distinct on the 

 lower back and rump, disappearing entirely on the upper tail- 

 coverts ; lesser and median wing-coverts like the back, the 

 greater series, as well as the primary-coverts and quills, dusky- 

 brown, externally olive-brown, the margins rather broader on 

 the innermost secondaries ; tail feathers dark brown, with 

 olive-brown margins, and ribbed across with dusky bars, very 

 distinct in certain lights ; lores and sides of face dark brown ; 

 over the eye a very faint line of whitish ; cheeks, throat, centre 

 of breast and abdomen whitish j the sides of the throat, breast, 

 and sides of the body brown, washed with buff; under tail- 

 coverts buffy-white, with dark centres ; axillaries and under 

 wing-coverts ashy-fulvous, the latter with dusky centres ; bill 

 dark brown, paler on the lower mandible ; feet flesh-colour or 

 pale brown ; iris clear brown. Total length, 5-3 inches ; cul- 

 men, 0-5 ; wing, 2-3 ; tail, 2*0 ; tarsus, 0-85. 



Adult Female. — Similar to the male in colour and markings, 

 but somewhat warmer brown above, and more fulvescent 

 below. Total length, 5-4 inches; wing, 2*4. 



Young. — Slightly more rufescent and not so clear olive-brown 

 a' ove than the adults, and tinged with sulphur-yellow on the 

 throat and breast, with numerous tiny spots of blackish-brown on 

 the lower throat and fore-neck ; the under tail-coverts are ru- 

 fescent, with ashy whitish tips and dark brown centres to the 

 feathers. Even after the spring moult there are often remains 

 of the stripes on the fore-neck, and the under parts are dis- 

 tinctly suffused with yellow. Such specimens are probably 

 birds of the previous year. 



B. — The Grassli rbler is easily recognised by its - 



back and olive-brown colour. The only Warblers, therefore, will 

 it might be at first confused are the Se !^e-Warbler and Aquatic Warbler, 

 bulb of which have striped backs. They are, moreover, not o:. 



