1 9 1 8 • ] recently collected in Siam. 205 



Mixornis gularis rubricapilla Harington, Bull. B. O. C. 

 xxxiii. 1913, p. 63; id. Journ. Bombay Nat. Hist. Soc. 

 xxiii. 1915, pp. 632-633. 



Mixornis gularis minor Gyldenstolpe, Kungl. Sv. Vet.- 

 Akad. Handl. Ivi. No. 2, 1916, p. 60. 

 7 c?, 2 ? . Lat Bua Kao. 



Iris pale yellow to ochreous ; bill dark plumbeous or pale 

 plumbeous, with culmen blackish ; or maxilla blackish, 

 raaudible plumbeous ; feet olive-yellow or brown or greenish- 

 brown. 



Males : T. L. 132, 130, 130, 130, 130, 130, 130. 

 Females: T. L. 127, 122. 

 Males : W. 54, 57, 54, 55, 54-5, 54-5, 56. 

 Females : W. 52-5, 53. 



Males : Ta. 16, 16, 16-5, 17, 16-5, 16-5, 16-5. 

 Females: Ta. 16-5, 16. 



Males : B. f. g. 15-6, 15-2, 15, 15 7, — 15*2, 15. 

 Females : B. f. g. 15-3, 15. 



The loan by Mr. W. J. F. Williamson of eighteen speci- 

 mens of Mixornis from various parts of Siam enables me to 

 state tliat birds from eastern Siam (fifteen examples from 

 Lat Bua Kao and two from Muak Lak) are indistin- 

 guishable from topotypes of M. g. minor Gyldenstolpe, 

 from northern Siam (five specimens examined, wings 50- 

 55 mm.), which are stated to be the same as specimens 

 from Ahsohn (Aswon) east of Moulmein, Tenasserim. 

 The only differeflce between the birds from the two areas 



preoccupied by Motacilla gularis Gm. He suggests that Prima pileata, 

 applied by Blytli (Journ. Asiat. Soc. Bengal, xi. 1842, p. 204) to birds 

 from Malacca, should be used, but he has not realised that Motacilla 

 rubricapilla Tickell, is ouly subspecifically distinct and is thus next in 

 priority. If the lirst race known had to remain the type of the species 

 whatever name it eventually bore, we should have to call this bird 

 Mixornis sumatranus (Bp. Consp. Av. i. 1850, p. 217). Such a practice 

 would seem to me logical, as the first race described ought to be always 

 the type of the species irrespective of its title. Hors6eld in 1824 (Zool. 

 Res. in Java) gave an excellent description of Raffles's bird under the 

 name Timalia gularis, but by the rules governing zoological synonymy 

 this name is unfortunately unavailable. 



SER. X. VOL. VI. Q 



