The nominotypical subspecies ranges from Japan (Hokkaido, Honshu, Kyushu), Primorskiy Kray and the Korean Peninsula, south and west through China to W Sichuan, SE Xizang/Tibet, NW Yunnan in the west, and N Guizhou, NW Guangxi and N Guangdong in the east. The species appears to be absent from the Sichuan Basin and the lowlands of southern Guangxi and Guangdong. Phyllosphingia dissimilis perundulans ranges from SE Nepal through Meghalaya, Nagaland and Arunachal Pradesh to NW Yunnan. It is currently unclear whether these two subspecies meet, or even overlap, in the area around Leaping Tiger Gorge. The complex geography of that region makes precise locality data imperative if the matter is to be investigated properly. Phyllosphingia dissimilis berdievi is restricted to the mountains of north and central Vietnam and adjacent areas of NE Laos. The status of the population in the mountains of Hainan requires further study, but current evidence suggests it is likely to be Phyllosphingia dissimilis berdievi. Inoue (1973) (STI 18557) reported a single male Phyllosphingia dissimilis dissimilis (as Phyllosphingia dissimilis hoenei) from Laguna, Luzon, Philippines, but commented that “its genitalia are too abnormal to compare with other populations”. A scan of two monochrome prints of this specimen and its genitalia have been loaded onto the STI. The record requires confirmation and it is not mapped.