Three subspecies of Muscicapa narcissina Temminck of the Riu Kiu Islands are discussed. The size difference is clear between southern owstoni and northern jakuschima, but very slight between the latter and shonis. The maximum difference of wing length is:
owstoni_??_jakuschima 5.5mm
owstoni_??_shonis 3-5mm
shonis_??_jakuschima 0.5-2.5mm
The auther, therefore, considers shonis a synonym of jakuschima.
