THE BIRDS OF NORTHERN THAILAND 415 



Shulpin has separated the population of South Ussuri-land, under 

 the name Larvivora cyane bockaiensis (Ezhegodnik Zoologicheskogo 

 Muzeia, Akademiia Nauk SSSR, vol. 27, 1927, pp. 404-405), as being 

 darker and less grayish than cyane. All specimens seen from Hok- 

 kaido answer to this description, in contrast to those from other 

 localities, but I am informed by Delacour and Mayr (in epist.) that 

 topotypical material is unstable and that the race cannot be main- 

 tained. Since Japanese ornithologists list only the nominate form 

 from their islands, it seems best to assume that the uniformity of 

 coloration shown by my Hokkaido skins is accidental and that the 

 species cannot be divided. 



LUSCINIA CALLIOPE CALLIOPE (Pallas) 



Siberian Rubythroat 



Motacilla Calliope Pallas, Reise durch verschiedene Provinzen des russischen 

 Reichs, vol. 3, 1776, pp. 261, 325, 697 ("A Ienisea vsque ad Lenam"). 



Calliope calliope, Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 1931, p. 142 

 (Chiang Mai) ; 1936, p. 112 (Chiang Mai, Doi Suthep). — de Schauensee, 

 Proc. Acad. Nat. Sci. Philadelphia, 1934, p. 210 (Doi Suthep, Chiang Mai, 

 Doi Chiang Dao).— Riley, U. S. Nat. Mus. Bull. 172, 193S, p. 404 (Chiang 

 Mai, Doi Langka). 



The Siberian rubythroat is common in migration (October, March) 

 and somewhat less so during the intervening months, at least in the 

 provinces of Mae Hong Son and Chiang Mai; it occurs chiefly on 

 the plains but has been taken once on Doi Suthep at 2,500 feet (Jan- 

 uary) and twice on Doi Chiang Dao at 4,500 feet (November, Jan- 

 uary). At Chiang Mai the extreme dates are October 7 (1936) and 

 April 3 (1931). 



This bird, like the preceding, haunts dense thickets and bamboo 

 brakes, especially such as follow abandonment of cultivation, rarely 

 ascending so high as 2 feet above ground and keeping its back turned 

 to the observer in such a way as to conceal the red throat patch. 



My winter-collected specimens had the irides brown ; the bill dark 

 brown, light horny brown at the base ; the tarsi horny brown or light 

 pinkish brown, whitish behind ; the toes and claws light horny brown. 



The adult male, as seen in Thailand, has the entire upper plumage 

 olivaceous-brown, the wing feathers narrowly edged with rufous; a 

 narrow supercilium white; the lores and area immediately below 

 the eye black ; a conspicuous mustachial line white ; the chin and throat 

 shining crimson-scarlet, narrowly edged with black ; the upper breast, 

 next to the black, dark gray, changing to buffy brown on the lower 

 breast and upper flanks, the last-named color changing to buff on the 

 lower flanks and to white on the center of the abdomen; the under 



