THE BIRDS OF NORTHERN THAILAND 513 



streaks. With wear, the feathers of the upperparts and wings tend 

 to lose their light edgings, while the buffy wash disappears both 

 above and below, so that the plumage becomes generally duller and 

 darker. 



Anthus r. malayensis, the race resident in Peninsular Thailand, is 

 separable from rufulus at any season by its stronger bill and, in fresh 

 plumage, by its heavier pectoral streaking and the darker upperparts, 

 which result from a lesser amount of buffy suffusion. 



ANTHUS RICHARDI SINENSIS (Bonaparte) 



Chinese Paddy-field Pipit 



C[orydalla] sinensis Bonaparte, Conspectus generiun avium, vol. 1, 1850, p. 247 



("China mer[idionalis]"). 

 Anthus richardi striolatus, Gyldenstople, Kungl. Svenska vet.-Akad. Handl., 



1913, p. 42 (Den Chai). 

 Anthus richardi striolatus [partim], Gyldenstolpe, Ibis, 1920, p. 461 (Den Chai). 



I place under this name only the female reported (1913) by Gylden- 

 stolpe from Den Chai, February 15, 1912 (wing length: 88.5 mm., 

 not 87 as published), and a second female collected by me at Ban Pong 

 Fa (Chiang Kai Province), May 4, 1936 (wing length: 88.8 mm.). 

 The race winters commonly in eastern Thailand and it is perhaps sig- 

 nificant that the two northern specimens are both from districts east 

 of the Khun Tan chain. 



A. r. sinensis is merely a rather larger edition of rufulus. For 

 comparative wing lengths of the three forms of paddy-field pipit oc- 

 curring in northern Thailand, see under A. r. richardi. 



ANTHUS RICHARDI RICHARDI Vieillot 



Siberian Paddy-field Pipit 



Anthus Richardi Vieillot, Nouveau dictionnaire d'histoire naturelle, nouv. 6d. f 



vol. 26, 1818, pp. 491-493 (France). 

 Anthus rufulus [portim], Gyldenstolpe, Journ. Nat. Hist. Soc. Siarn, 1915, p. 171 



(listed). 

 Anthus richardi striolatus, Gyldenstolpe, Kungl. Svenska Vet.-Akad. Handl., 1916, 



p. 32 (Khun Tan). 

 Anthus richardi striolatus [partim], Gyldenstolpe, Ibis, 1920, p. 461 (Khun Tan). 

 Anthus richardi rufulus [partim], Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 



1931, p. 154 (Chiang Mai [partim] ). 

 Anthus richardi richardi, de Schauensee, Proc. Acad. Nat. Sci. Philadelphia, 



1934, p. 239 (Chiang Mai).— Riley, U. S. Nat. Mus. Bull. 172, 1938, p. 476 



(Ban Nam Khian). 

 Anthus novae-seelandiae richardi, Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 



1936, p. 121 (Chiang Mai). 

 Anthus campestris godlewskii, Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 1936, 



p. 122 (Chiang Mai). 



