BIRDS FROM SIAM AND THE MALAY PENINSULA 377 



Dr. VY. L. Abbott collected three males and two females in the 

 Mergui Archipelago in 1900 (Sullivan Island, February 4; Domel 

 Island, February 23 and 27; Bentinck Island, March 12); two males, 

 Trang (Chong, January 21, 1897; and Kao Nok Ram, January 4, 

 1899). He gives the soft parts as: Iris gray, dark gray, or grayish 

 white; upper mandible horn brown, low^er mandible pale leaden; 

 feet pale fleshy brown. 



This form ranges from northern Siam south through Peninsular 

 Siam to Trang, where it occurs along with olivacea, and it is a question 

 whether it is a form of that species, belongs to some other form group, 

 or is only a winter visitor. It can be distinguished from olivacea by 

 being more yellowish below, with the under tail coverts clay color 

 instead of straw yellow; the upper parts are huffy olive rather than 

 light brownish olive; the bill is smaller, culmen about 17 mm. Culmen 

 in olivacea, 18-19.5 mm, 



Robinson and Kloss ^' also found the two forms in Trang. 



The specimen from the Khun Tan Mountams agrees better with 

 this race than any other occurring in Siam. It is in fresh plumage; 

 through some accident it has lost its tail and is acquiring a new one, 

 which is about half grown. The only differences between it and 

 Peninsular specimens are the slightly grayer throat and larger bill of 

 the former. The culmen in the male from Ivhun Tan Mountains 

 measurs 17.5 mm. 



This extends the range of this form to the northward and into the 

 territory occupied by propinqua; to the southward it occurs along with 

 olivacea and brings up the question of whether these three forms should 

 not be treated as species. 



lOLE OUVACEA PROPINQUA (Oustelet) 



Criniger propinquus Oustalet, Nouv. Arch. Mus. Paris, ser. 4, vol. 5, p. 76, 1903 



(Pamoii, Tonkin). 

 Criniger lonnbergi Gyldenstolpe, Kungl. Svenska Vet.-Akad. Handl., vol. 50, 



no. 8, p. 24, 1913 (Bang Hue Horn, northern Siam). 



One male, Doi Angka, December 3, 1928; one male and two females, 

 Khun Tan, 4,000 feet, August 29 and September 7, 1930, February 25, 

 1932; one male. Fluey Me Sae, December 24, 1932; one male, Sakeo, 

 near Krabin, May 7, 1928; tw^o females, Hupbon, November 3 and 5, 

 1931 ; four males and one female, Hin Lap, December 6 and 10, 1931; 

 one male, Amphar Klong, Chantabun, Jtrnuary 4, ] 930; two males and 

 a female, Kao Scming, Krat, October 10, 15, 1928; throe males, two 

 females, and one unsexed, Kao Sabap, November 14-25, 1933. 



This series seems to agree with Cochinchina specimens examined, 

 which are few and in rather poor condition. They are somewhat 

 darker above than Siamese specimens, but when better material is 



»' Journ. Nat. Hist. Soc. Slam, vol. 8, p. 266, 1924. 



