Centroctena rutherfordi
Superficially similar to Hippotion geryon but immediately distinguishable by the shape of the pale postmedial band and crenulated forewing outer margin. Distinguished from Centroctena imitans by the broader forewing, with a less crenulated and angulate outer margin with the tooth on M2 the same size as that on M1. Forewing upperside with postmedial lines much more strongly undulate between the apex and M3 than in Centroctena imitans.
Male genitalia: Uncus rather narrow and obviously curved, apically slightly sinuate. Gnathos apically rounded.Valve with about 12 large stridulatory scales. Harpe a long, slender, horizontal, cylindrical process, slightly upcurved apically. Phallus superficially similar to Theretra clotho group in having a large patch of erect, somewhat curved, deciduous spines, their tips pointing distad; differing, however, in the spines being curved (not straight) and having only a single point, rather than multiple (caltrops) points.
Female genitalia: Sterigma similar to Theretra lycetus, but more triangular. Ostium bursae asymmetrical, but not so prominent as in Theretra lycetus.