''Gnathothlibus brendelli'' is a moth of the family Sphingidae. It is known from

Sulawesi Sulawesi (), also known as Celebes (), is an island in Indonesia. One of the four Greater Sunda Islands, and the world's eleventh-largest island, it is situated east of Borneo, west of the Maluku Islands, and south of Mindanao and the Sulu Ar ...

Description

The length of the forewings is about 46 mm. It is similar to ''

Gnathothlibus meeki ''Gnathothlibus meeki'' is a moth of the family Sphingidae. It is known from Papua New Guinea. It prefers mountainous areas. The species name honours Albert Stewart Meek Albert Stewart Meek (26 October 1871 – 1 October 1943) was an Eng ...

'' but differs in the longer, strongly falcate forewings, the red coloration on the underside of the thorax and the hindwing discal spot. The head has a red stripe anterior to the eye and a creamy yellow spot at the base of the antenna. The upperside of the thorax is dark brown with two prominent pale yellow spots. The outer margins of the tegulae are creamy yellow. The underside of the thorax is red laterally, pale yellow in the centre and dark brown near the legs. The forewing upperside pattern is reminiscent of ''

Ampelophaga khasiana ''Ampelophaga khasiana'', the scarce vine hawkmoth, is a moth of the family Sphingidae. It was described by Walter Rothschild in 1895. It is found from Nepal, Sikkim in north-eastern India and to central China. The wingspan is 80–102 mm. ...

'' but with a strong greenish tint. The ground colour is dark green-brown with an obscure pattern of transverse lines and bands. The forewing underside is bright yellow with a brown outer margin and dark yellow irroration on the outer third of the wing. The hindwing upperside is bright yellow with a black spot at the base. The marginal band is dark brown.

References

Gnathothlibus Moths described in 1983 Moths of Indonesia {{Macroglossini-stub