486 BULLETIN 186, UNITED STATES NATIONAL MUSEUM 



marsh vegetation. With such habits, it may well be a not uncommon 

 winter visitor to our area, despite the paucity of definite records. 



My specimens had the irides bright brown ; the maxilla brownish 

 black or blackish brown, with the edges of the commissure fleshy ; the 

 mandible fleshy; the feet and toes fleshy; the claws horn or horny 

 flesh. 



This species has the entire upperparts rufescent olivaceous-brown, 

 most of the feathers with broad black central streaks; a very indis- 

 tinct buffy supercilium ; the underparts white, washed with buff (most 

 strongly along the flanks, sides of the abdomen, and on the under tail 

 coverts), the feathers of the breast, flanks, and under tail coverts with 

 lanceolate black central streaks. 



LOCUSTELLA CERTHIOLA MINOR David and Oustalet 



Amur Gray-naped Grasshopper Warbler 



Locustella minor David and Oustalet, Oiseaux de la Chine, 1877, pp. 250-251 



(Peking, China). 

 Locustella lanccolata, Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 1931, p. 148 



(Chiang Mai). 

 Locustella certhiola minor, Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 1936, 



p. 114 (Chiang Mai). 

 Locustella lanceolata [partim], Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 



1936, p. 114 (Chiang Mai [partim]). 



The gray-naped grasshopper warbler is an apparently rare winter 

 visitor to the northern provinces, where I have collected three speci- 

 mens : a female from the Chiang Mai plain, February 17, 1931 ; a male 

 from the same locality, November 28, 1935 ; and an unsexed bird from 

 Ban Na Noi (Nan Province), April 2, 1937. 



The Chiang Mai examples were found at a small marsh but that from 

 Na Noi, obviously a migrant, was shot beside a small, drying river 

 (the Nam Haeng) , on a beach of sand and gravel almost covered by 

 a dense growth of takrai nam (Homonoia riparia). The habits of 

 this species seem to be quite like those of the lanceolated warbler. 



A male had the irides brown ; the maxilla dark horny brown ; the 

 mandible flesh ; the feet and toes dark flesh ; the claws horn. A female 

 differed in having the maxilla brownish black; the mandible horny 

 brown, fleshy at the base ; the feet and toes pale flesh ; the soles whitish. 



This bird superficially resembles its congener but has the ground 

 color of the occiput and nape more or less strongly overlaid with 

 ashy ; a fairly conspicuous buffy supercilium ; the rectrices olivaceous- 

 brown with an outwardly increasingly broad ashy tip and a black 

 subterminal bar (these markings more evident beneath, where the 

 pale tips are ashy white) ; the underparts usually immaculate (the 

 sides of the lower throat and breast occasionally with tiny, obsolescent 

 blackish spots). 



