Xylophanes elara is a moth of the family Sphingidae. It is known from Paraguay, Surinam, Venezuela, Bolivia and Brazil. The upperside of the wings and body are olive-green and the distal margin of the forewing is strongly excavate below the falcate apex, then convex. The dorsal scales of the antennae are basally brown, distally cream before the apex. The thorax is unicolorous. The abdomen has a thin darker olive-greenish olive medial line dorsally. The underside of the abdomen is whitish-grey. The forewing upperside has a small, conspicuous, black discal spot. The postmedian lines are straight and oblique. The first to third lines are faint, the fourth is much stronger and the fifth is not distinct except apically. The submarginal line is faint and highlighted by a row of faint vein spots.