1918.] described Siamese and Malayan Birds. 591 



The colour of the shaft-stripe of the central tail-feathers 

 is not constant ; two of the Borneau birds agree with those 

 from the Malay Peninsula in having the terminal part white 

 tipped with black at the extreme tip, while a few Malayan 

 specimens have the shaft- stripe black throughout. 



We are unable to appreciate any alleged differences in the 

 colour of the feathers of the head. 



While dealing- with these species we have worked through 

 the very large series of the genus in our collection, and find 

 that three forms are represented, viz. : (1) Tchitrea princeps 

 (Temm.), a rare winter visitor, of which we possess an adult 

 male from the vicinity of Taiping, dated 31 October, and a 

 female from Ginting Bidei, near Kuala Lumpur, shot in 

 April. (2) Tchitrea paradisi affinis (Blyth), apparently 

 resident throughout the year ; and (3) Tchitrea paradisi 

 incii Gould, only found from October to April. 



The last two forms are amongst the most difficult of birds 

 satisfactorily to discriminate, but adults in white plumage 

 appear to differ by the much stronger median black shaft- 

 stripes in back, mantle, and tail in T. p. incii. Young birds 

 and females of T. incii appear to acquire very early a black 

 throat, sharply defined from the breast, which is not present 

 in our fifty specimens of T. p. affinis. 



-^ Gerygone griseus. 

 Gyldenstolpe, Ornith. Monatsb. 1916, p. 27 : id. Kongl. 

 Sv. Yet.-Akad. Handl. Ivi. No. 2, 1916, p. 78, pl.li 

 fig. 2. 



Count Gyldenstolpe has established this species on a 

 single specimen from Koh Lak in peninsular Siam, and 

 states that it differs from G. modiglianii Salvad., from 

 Sumatra and the Malay Peninsula, in lacking the dusky 

 horsesiioe mark on the sides of the fore neck. 



We have before us seven specimens from vaiious parts of 

 the Malay Peninsula and one from western Sumatra. 



One of the former is from Pulau Panjang Anak, a small 

 island near Junk Zeylon on the west side of tiie Peninsula, 

 not far distant from Koh Lak. 



