THE BIRDS OF NORTHERN THAILAND 483 



bill proportionately much shorter and thus apparently thicker; the 

 olivaceous-brown of the upperparts more strongly washed with rufes- 

 cent, especially on the crown and nape; in the lack of a pale super- 

 cilium; and in having the rectrices more strongly graduated. 



ACROCEPHALUS ARUNDINACEUS BRUNNESCENS (Jerdon) 



Indian Great Reed Warbler 



Algrobates] brunnescens Jekdon, Madras Oourn. Lit. Sci., vol. 10, 1839, p. 269 



(The Carnatic, near Trichinopoly, southern India). 

 Acrocephalus stentoreus amyae, Deiqnan, Journ. Siam Soc. Nat. Hist. Suppl., 



1936, p. 114 (Chiang Mai J. 



The present form is known in northern Thailand only as an ap- 

 parently rare winter visitor to the Chiang Mai plain, where I have 

 taken three examples : a female, January 19, 1932 (skin at Princeton) ; 

 a male, November 29, 1935; and a female, January 16, 1937. 



In habits and appearance it is nowise distinguishable in life from 

 the commoner Japanese race, with which it shares the same reed 

 beds. 



A female had the irides yellowish brown; the maxilla blackish 

 brown, with the edges of the commissure fleshy ; the mandible plum- 

 beous-flesh; the rictus, interior of the mouth, and the skin of the 

 chin salmon; the feet and toes horny violet; the claws dark horny 

 brown. 



This is a large, strong-billed reed warbler without conspicuous 

 markings. It has the upperparts olivaceous-brown, suffused with 

 rufescent on the mantle and upper tail coverts and with rufescent- 

 buff on the rump; a short, indistinct brownish-white or buffy- white 

 supercilium ; the lores and a small spot behind the eye blackish brown ; 

 the underparts buff (this color richest on the under tail coverts, 

 region of the vent, the flanks, and under wing coverts) , the center of the 

 abdomen albescent, the chin and throat almost white. A. a. brun- 

 nescens has the second primary shorter than the fifth; in the two 

 specimens before me, it is equal to the sixth. 



ACROCEPHALUS ARUNDINACEUS ORIENTALIS (Temminck and Schlegel) 



Japanese Great Reed Warbler 



Salicaria turdina orientalis Temminck and Schlegel, in Siebold, Fauna Japonica, 



Aves, 1847, pp. 50-51, pi. 21 B [=20 B] (Japan). 

 Acrocephalus arundinaceus orientalis, Deignan, Journ. Siam Soc. Nat. Hist. 



Suppl., 1931, p. 148 (Chiang Mai) ; 1936, p. 114 (Chiang Mai). 



The Japanese great reed warbler is a locally common winter visitor 

 at Chiang Mai, where I have found it between December 2 (1935) 

 and April 3 (1931). 



