Theretra insularis is a moth of the family Sphingidae first described by Charles Swinhoe in 1892. It is known from the Philippines, north-eastern Borneo, the Moluccas, Papua New Guinea, the Solomon Islands and Fiji.
Subspecies
- Theretra insularis insularis (the Philippines, north-eastern Borneo, Moluccas, Papua New Guinea, Solomon Islands, Fiji Islands)
- Theretra insularis ambrymensis <small>Lachlan, 2004</small> (Ambrym Island)
- Theretra insularis lenis <small>Jordan, 1926</small> (Solomon Islands)
- Theretra insularis mollis <small>Jordan, 1926</small> (St. Matthias Island)
- Theretra insularis valens <small>Jordan, 1926</small> (New Ireland)
References