148 BULLETIN 186, UNITED STATES NATIONAL MUSEUM 



The absence of sinuation on the inner web of the third primary and 

 the narrowness of the outer rectrices are both merely signs of imma- 

 turity in treronine pigeons; the color characters are all within the 

 normal range of variation of the species. It is significant that 

 Gyldenstolpe's specimen was shot on May 26, just after the breeding 

 season, and that two of my birds which show the wing and tail char- 

 acters of yseudo-crocopus are both in postjuvenal molt and just hap- 

 pen not yet to have lost the feathers in question. 



DUCULA AENEA SYLVATICA (Tickell) 



Indian Green Imperial Pigeon 



Columba sylvatica Tickeix, Journ. Asiat. Soc. Bengal, vol. 2, 1833, p. 581 (Borab- 



ham and Dholbham, India). 

 Carpophaga aenea, Gyldenstohpe, Kungl. Svenska Vet.-Akad. Handl., 1913, p. 66 



("Northern provinces"). 

 Carpophaga aenea aenea, Gyldenstolpe, Journ. Nat. Hist. Soc. Siam, 1915, p. 234 



(listed) ; Kungl. Svenska Vet.-Akad. Handl., 1916, p. 155 (Pang Hua Phong). 

 Muscadivora aenea sylvatica, Gyu>enstolpe, Ibis, 1920, p. 740 ("Throughout the 



whole country"). — de Schatjensee, Proc. Acad. Nat. Sci. Philadelphia, 1934, 



p. 272 (Chiang Rai). — Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 1936, 



p. 85 (Doi Suthep, error). 



The green imperial pigeon is scarcely to be found outside of the 

 districts with lowland evergreen forest, and while for this reason it is 

 common and generally distributed in Chiang Kai and Nan, occurring 

 even in the villages, it is only locally present in other provinces. In 

 the immediate neighborhood of Chiang Mai it is unknown, and it seems 

 not to occur nearer the city than at Ban Pong (a village south of Doi 

 Suthep), where there is a small stand of tall evergreen; the market 

 specimen recorded by me in 1936 possibly came from this place. Eisen- 

 hofer sent to Stockholm three examples from Khun Tan. I have it 

 from Muang Fang, Ban Khana, and Muang Ngop. 



A specimen from Ban Khana had the gonads enlarged, April 20; 

 another from Ban Pong, February 15, had them slightly enlarged. 

 An adult from Muang Fang, July 18, is nearing completion of the post- 

 nuptial molt. 



A male had the irides deep red ; the eyelids plumbeous, edged red ; 

 the cere purple-rose ; the maxilla with the anterior half blue-white, the 

 rest plumbeous; the mandible plumbeous, blue-white at the tip and 

 edges of the commissure on the anterior half; the feet and toes 

 purple-red. 



The adult has the head, neck, and entire underparts soft gray, 

 washed with pink; the remaining upperparts metallic green, glossed 

 with copper, bronze, and deep blue; the under tail coverts deep 

 chestnut. 



