340 BULLETIN 186, UNITED STATES NATIONAL MUSEUM 



Iole virescens lonribergi, Deignan, Journ. Siam Soc. Nat Hist, Suppl., 1931, p. 

 140 (Doi Suthep) ; 1936, p. 110 (Doi Suthep). 



Iole virescens lonribergi Ipartim], de Schauensee, Proc. Acad. Nat. Sci. Philadel- 

 phia, 1934, p. 204 (Doi Suthep, Khun Tan, ridge just south of Doi Chiang 

 Dao.) 



Iole olivacea cinnamomeoventris [partim], Riley, U. S. Nat. Mus. Bull. 172, 1938, 

 p. 376 (Khun Tan). 



Iole olivacea propinqua [partim], Riley, U. S. Nat. Mus. Bull. 172, 1938, p. 377 

 (Doi Ang Ka, Khun Tan, Huai Mae Sae). 



Iole olivacea propinqua, Greenway, Bull. Mus. Comp. Zool., 1940, p. 177 (Doi 

 Nang Kaeo, Chiang Dao). 



The present race of the viridescent bulbul is fairly common through- 

 out the northern provinces in districts with light evergreen or mixed- 

 deciduous forest, from the level of the plains to 3,500 (rarely to 4,600) 

 feet. 



The habits of this species are much like those of Criniger t. 7ienrici, 

 with which it sometimes associates, but it is a shier and less noisy 

 form, uttering from time to time merely a soft, whistled note. It is 

 usually seen singly or in pairs but may gather in numbers at fruit- 

 bearing trees. 



Gylclenstolpe (1916) took a nestling at Pha Hing, April 11, and a 

 juvenile at Pha Kho, April 7. Specimens collected by Smith at 

 Khun Tan, August 29 and September 7, are in postnuptial molt. 



Adults have the irides clear gray ; the maxilla blackish brown ; the 

 mandible horny gray ; the feet and toes fleshy brown. 



The viridescent bulbul resembles a smaller, scarcely crested Criniger. 

 It has the upperparts dull olivaceous (the tail browner) ; the under - 

 parts olivaceous-gray, albescent on the throat and everywhere washed 

 with light greenish yellow (clearer yellow on the abdomen) ; the 

 under tail coverts cinnamon-buff. 



The race of North Thailand may be separated from that of the 

 more southern districts (north of the Isthmus of Kra) by its greater 

 size (wing length : 85-90 mm., against 80-85 mm.) and slightly darker 

 upperparts. The southern form must probably be known as cin- 

 namomeoventris (Tenasserim Town), which, fide Ticehurst (Journ. 

 Bombay Nat. Hist. Soc, vol. 36, 1933, p. 925), differs from propinquus 

 in exactly these characters. 



The numerous specimens from Peninsular Thailand (between the 

 Isthmus of Kra and the Malayan border), which have been recorded 

 by Robinson and Boden Kloss, Chasen, and Riley as cinnamomeoven- 

 tris are, in my opinion, merely slightly aberrant examples of cryptus, 

 which bear not the least resemblance to true cinnamomeoventris^ as 

 here understood. 



The unique specimen of "cinnamomeoventris'''' recorded from Khun 

 Tan by Riley (1938) differs, to my eyes, in no particular from 

 propinquus of the same locality except insofar as it is the most worn 



