Alseonax siamensis Gyldenstolpe, Orn. Monatsber., vol. 24, No. 2, February 1916.= Muscicapa dauurica siamensis Gyldenstolpe, 1916
Holotype ? : Male ad., Bang Hue Pong, Northern Siam. 27. V. 1914. N. Gyldenstolpe leg. No. 421. - Measurements of type : wing : 68 mm.; tail : 51 mm.; culmen : 11,5 mm.; tarsus : 12 mm.Click on the picture for enlargement.
Foto © NRM Anna Constantinides