THE BIRDS OF NORTHERN THAILAND 471 



PHYLLOSCOPUS ARMANDII ARMANDII (Milne Edwards) 



Northern Streaked-breasted Willow Warbler 



Abrornis Armandii Milne Edwards, Nouv. Arch. Mus. [Paris], vol. 1, 1865, Bull., 

 pp. 22-23, col. pi. 2, fig. 1 (no locality given ; type specimen "from mountains 

 W. and N. W. of Pekin," fide Ticehurst, Systematic review of the genus 

 Phylloscopus, 1938, p. 91). 



The nominate race of P. armandii finds a place in our list on the 

 basis of a male from the vicinity of Chiang Mai (at the foot of Doi 

 Suthep, near Doi Kham), March 20, 1936, identified as of this form by 

 my late friend Dr. Claud B. Ticehurst, and an unsexed specimen from 

 the other side of Chiang Mai (Ban Pa Muat) , March 19, 1936, pro- 

 visionally placed here by the same authority. 



Both of these examples "were collected by me from low undergrowth 

 in dry, deciduous forest at about 1,000 feet elevation. 



The bird of March 20 is beginning prenuptial molt. 



Typical armandii, according to Ticehurst (loc. cit.), "resembles 

 Phylloscopus armandii perplexus, but is a little paler and greyer 

 above; the yellow and buff on the under parts is paler. Differences 

 can be seen in a series, but not easily on single, worn or poor skins." 



PHYLLOSCOPUS ARMANDII PERPLEXUS Ticehurst 



Southern Streaked-breasted Willow Warbler 



Phylloscopus armandii perplexus Ticehurst, Bull. Brit. Orn. Club, vol. 54, 1934, 

 pp. 96-97 (Chien-chuan valley, lat. 26° 40' N., northwestern Yunnan). 



Phylloscopus armandii armandii, de Schauensee, Proc. Acad. Nat. Sci. Phila- 

 delphia, 1934, pp. 3, 230 (Chiang Mai). — Deignan, Journ. Siam. Soc. Nat. 

 Hist. Suppl., 1936, p. 116 (Chiang Mai). 



Dr. Ticehurst identified as P. a. perplexus a female taken by me on 

 Doi Suthep, 1,800 feet, January 25, 1936; a male from Chiang Mai 

 (Ban Pa Muat), March 19, 1936; and a female from Ban San Pa Pao, 

 December 20, 1936. The male collected by de Schauensee at Chiang 

 Mai, January 28, 1933, is evidently the example which first led Tice- 

 hurst to include "N. W. Siam" in the winter range of the race ( System- 

 atic review of the genus Phylloscopus, 1938, p. 93). 



P. a. perplexus occurs in precisely the same arid forests as armandii 

 and the species seems not to ascend the hills at all beyond the upper 

 limit of this type of vegetation. 



The bird of March 19 is in prenuptial molt. 



My specimens have the entire upperparts olivaceous-brown; the 

 lores and postocular streak similar but darker; the supercilium buffy 

 white; the underparts pale yellow, becoming ashy on the chin and 

 throat, yellowish buff along the flanks and on the under tail coverts, 

 the throat, breast, and belly very indistinctly streaked with a deeper 

 yellow. 



