Hyloicus morio inouei Owada & Kogi, 1992, Mem. Natn. Sci. Mus., Tokyo (25): 164. Type locality: [Japan,] Hokkaido, Wakkanai, Yuchi, Gosen.
Synonym. Hyloicus morio inouei Owada & Kogi, 1992.
According to Owada & Kogi "rather small (forewing length: 29mm; 28-32mm in Sphinx morio morio). On the upperside of forewing, medial blackish brown band prominent, while in Sphinx morio morio it is obsolete between veins M3 and Cu2 and the outer margin of dorsal portion becomes dim; black stria in the cell minute and the blackish band swallowing the stria almost absent, while in Sphinx morio morio it is very long with a prominent black band. In the male genitalia, ventral process of harpe definitely shorter then the dorsal one, while they are almost of the same length in Sphinx morio morio."
Frequents mixed coniferous\deciduous woodland.
Japan: 23.vi (Hokkaido); 3.viii (Hokkaido).
Japan: Hokkaido (Gosen, 60m).
Endemic to northern Hokkaido, Japan.
Subsp. morio (Owada & Kogi, 1992) inhabits only Honshu; subsp. arestus (Jordan, 1931) occurs from Tsushima (Japan), Korea, north-eastern China and the Russian Far East across southern Siberia and Mongolia to the Altai (Owada & Kogi, 1992).