THE BIRDS OF NORTHERN THAILAND 91 



I am skeptical of the validity of henrici, which, fide Delacour, is 

 the subspecies of French Laos, and which has been reported by Dela- 

 cour and Greenway from a locality just across the Mae Khong from 

 Chiang Saen Kao. De Schauensee's specimen from Chiang Saen is 

 typical brunneopeetus, as is my bird from Phu Kha, where, judged 

 from analogous cases, a Lao race should occur if such be distinct 

 from the Tenasserimese. De Schauensee mentions (1934) that a skin 

 from French Laos "is very close to Siamese birds and differs only in 

 having the ground color of the chin and throat tinged with buff." 

 Individuals with buff -tinged throats are common in western Thailand 

 in the same flocks as white-throated examples. Either henrici is not a 

 distinct form or the birds so named from western Laos are extremely 

 close to, or identical with, bininneopectus. 



tropicoperdix chloropus chloropus biyth 



Tenasserimese Green-legged Hill Partridge 



Tropicoperdix chloropus "Tickell" Blyth, Journ. Asiat Soc. Bengal, vol. 28, 1859, 

 p. 415 ("Mountainous interior of the Tenasserim provinces"). 



Tropicoperdix chloropus, Gyldenstolpe, Kungl. Svenska Vet.-Akad. Handl., 1913, 

 p. 67 (Ban Huai Horn, Khao Phlung) ; 1916, p. 156 (Khun Tan) ; Journ. Nat. 

 Hist. Soc. Siam, 1915, p. 235 (listed). 



Arboricola chloropus chloropus, Gyldenstolpe, Ibis, 1920, p. 735 (Ban Huai Horn, 

 Khao Phlung, Khun Tan). 



Tropicoperdix chloropus olivacea, de Schauensee, Proc. Acad. Nat. Sci. Philadel- 

 phia, 1929, p. 583 (Chiang Saen).— Riley, U. S. Nat. MusT Bull. 172, 1938, 

 p. 65 (Khun Tan, Mae Lang valley). 



Tropicoperdix chloropus chloropus, de Schauensee, Proc. Acad. Nat. Sci. Phil- 

 adelphia, 1934, p. 276 (Doi Suthep). — Deignan, Journ. Siam Soc. Nat. Hist. 

 Suppl., 1936, p. 79 (Doi Suthep). 



This partridge has been found in all our provinces ; it is common in 

 the lowland evergreen forest of the more eastern districts but rather 

 rare in the western hills, where it must compete with the two species 

 of Arborophila. In Stockholm are five specimens collected by Eisen- 

 hofer at Khun Tan. From Doi Suthep it is known by only two 

 examples, one taken by me at 3,500 feet, the other by de Schauensee 

 at 4,500 feet. I have collected it also at Chiang Rai, Ban Huai Som, 

 and on Doi Chiang Dao. 



The habits of the green-legged partridge, as I have observed them, 

 seem not to differ markedly from those of the other northern hill 

 partridges. The only indication we have of the breeding season is 

 the fact that my specimen from Doi Suthep, collected August 24, 

 1935, is a juvenile. 



De Schauensee records that adult specimens had the irides dark 

 brown ; the basal half of the bill deep crimson, the apical half olive, 

 tipped yellow; the orbital region crimson; the feet, toes, and claws 

 dark olive or olive-yellow. My juvenile bird had the irides brown; 



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