THE BIRDS OF NORTHERN THAILAND 151 



Macropygia tusalia tusalia, Gyldenstolpe, Ibis, 1920, p. 742 (Khun Tan). 

 Macropygia unchall tusalia, Dkignan, Journ. Siam Soc. Nat. Hist. Suppl., 1931, 



p. 167 (Doi Suthep). — Chasen and Boden Kloss, Journ. Siam Soc. Nat. 



Hist. Suppl., 1932, p. 233 (Doi Suthep).— Deign an, Journ. Siam Soc. Nat. Hist. 



Suppl., 1936, p. 86 (Doi Suthep). — de Schauensee, Proc. Acad. Nat. Sci. 



Philadelphia, 1934, p. 273 (Doi Chiang Dao).— Riley, U. S. Nat. Mus. Bull. 



172, 1938, p. 116 (Doi Ang Ka, Khun Tan, Doi Langka, Doi Hua Mot). 



The larger species of cuckoo dove is generally distributed on the 

 higher mountains, at least those of the more western provinces, dwell- 

 ing in the heavy evergreen, chiefly above 3,500 feet, occasionally as 

 low as 2,700 feet. It is, in my experience, a silent, retiring bird, 

 occurring singly or in pairs, and rarely noticed before it flies out from 

 the trees with noisy beating of wings. 



The breeding season with us is rather indefinite, varying with the 

 individual pair. Specimens with the gonads greatly enlarged were 

 taken on Doi Suthep, February 24 and September 12; on Doi Ang Ka, 

 September 1 (but a female taken there, September 3, had the ovaries 

 quite inactive). 



The period of molt shows corresponding irregularity. A female 

 taken at Khun Tan, May 12, is in postnuptial molt. A bird from Doi 

 Hua Mot, August 21, and another from Doi Ang Ka, December 7, 

 are both in postjuvenal molt. 



A breeding male had the iricles with a white inner, violet -rose outer 

 ring; the eyelids plumbeous; the orbital skin violet-red; the bill black; 

 the feet and toes purplish red; the claws horn-brown. A breeding 

 female had the irides with a pink inner, pale blue outer ring; the 

 eyelids fleshy purple; the orbital skin plumbeous-gray; the bill slaty 

 black ; the feet, toes, and claws like those of the male. De Schauensee 

 records that a male had the irides with a blue inner and a pink outer 

 ring. 



This is a slender, long-tailed pigeon. The adult male has the 

 throat and forehead buff; the crown, nape, and upper back metallic 

 green, violet, or a mixture of these colors; the remaining upperparts 

 deep red-brown, broadly barred everywhere with black; the breast 

 metallic violet, mixed with green, and more or less barred with black; 

 the remaining underparts, including the under tail coverts, pale buff. 

 The adult female is similar, but has the entire underparts deep buff, 

 narrowly barred everywhere with blackish brown. A male and a 

 female in postjuvenal molt resemble the adult female but differ in 

 having the crown and center of the upper back blackish brown, nar- 

 rowly barred with light rufous ; the upper back and breast with little 

 or no gloss; the bars of the underparts broader and blacker and 

 extending to the chin; the ground color of the breast light rufous; 

 the under tail coverts almost immaculate light rufous. 



