Hippotion socotrensis is a moth of the family Sphingidae. It is known from dry areas from eastern Kenya to southern Ethiopia and probably Somalia. It is also present on Socotra. The length of the forewings is 22–25 mm. The antennae are pale buff. The body and forewings are ochreous-olive. The forewings have indications of an antemedial band, and a darker, broad diffuse medial fascia. There is a short, indistinct oblique dark streak at the apex. The hindwings are uniformly darker brown. The cilia of both wings are chequered. Subspecies diyllus differs from the nominate race in having a paler, more greenish groundcolour and a more reduced median band, usually indicated by a large, diffuse, central dark spot.