338 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXIII. 



F. e. imberbis, Salvadori. Down the Eastern side of Burma from the 

 Kuby Mmes District through the Shan States and Karennee to Tenasserim; 

 this bird is almost identical with the N.-W. Himalayan birds, only differing 

 in being smaller. This is a very interesting point in evolution, and we 

 have the same phenomena (the tendency that the two extremes of a race 

 have in being much nearer in appearance to each other than to the inter- 

 vening races) in many other species in different genera — such as in Alcippe. 



A. ]). bmcei, Hume, from Western India, is almost identical with A. p. 

 pJmyrei, Blyth, from Tenasserim, although intervening, we have other sub- 

 species. Fellorneum ruficeps rujiceps, from S. India being nearer to P. r. 

 subochraceum from Lower Burma, than to P. r. mandellii or P. r. minus which 

 intervene. The Burmese Bush-Larks, Quails and Green Pigeons, etc., 

 being in some species hardly separable from Madras birds. Many other 

 cases of similarity between sub-species from the two extremities of the 

 geographical range of a species could be given, pointing out that given the 

 same conditions, two races will probably develop along similar lines. 



PoMATOEHiNUS EKTTHKOGEJsrYS erytheogejSTYS, Vigors. 

 Jlffor's Rusty-cheeked Schnitar Babbler. 



Fomatorhinus erythror/enys, Vigors, P.Z.S., 1831, p. 173 ; Sharpe, Oat. B. 

 M. vii., p. 430 ; Gates, F.B. I., i., p. 124. 



Description. — As in Gates, F. B. I. 



Distribution. — N.-W. Himalayas, Rawal Pindi to Simla, these birds show 

 very little trace of grey streakings on the breast. 



POMATORHINUS EKYTHROGENYS HAKINGTONI, Baker. 



Baker'' s Rufous-cheeked Scimitar Babbler. 



S. Baker. Bui. B G. C. xxxiii, p. 123, 1914. 



Description. — The whole chin, throat, and upper breast dark ashy-brown, 

 the feathers having merely whitish bases on the chin and throat, and white 

 centres on the breast. The upper parts are also somewhat darker and less 

 rufescent in the eastern than in the western form. 



Distribution. — Himalayas east from Sikhim. 



Pomatorhijstus bryxhrogenys macclbllanm, Jerdon. 

 MacClelland^ s Scimitar Babbler. 



Fomatorhinus macclellandi, Jerdon, B. I., ii., p. 32 (1863) ; Sharpe, Cat. 



B. M., vii., p. 431; Gates, F. B. I., i., p. 125. 

 Description. — As in Gates. 



Distribution. — Assam, south of the Bramaputra, Khasia hills, Naga 

 hills, Manipur and the Chin hills. 



PomatorhijSTUS erythrogenys imberbis, Salvadori. 



Salvadoii'' s Scimitar Babbler. 



F. imberbis, Salvadori, Mus. Civ, st. Nat. Genova (2), vii., p. 410 (1889) , 

 Gates, F. B. I., i., p. 125. (Footnote) ; Blanford, F. B. I., iv., App. 479. 



Almost identical in colouration with P. e. erythrogenys, from N.-VY. 

 Himalayas, differs in size. 



Length about 9'25; tail 3*4; wing 3-4; tarsus 1-45 ; culmen 1*2 inches. 



Distribution. — In the hills down the eastern side of Burma, from the 

 Ruby Mines District, through the Shan States and Karannee, to Tenasse- 

 rim. Gne or two specimens in the British Museiun, show indications of 

 grey stripes on the breast, and are probably intermediate between this 

 sub-species and P. e. gravirox. 



