Amphimoea walkeri
Abdomen upperside with 4 yellowish dorsal stripes; lateral patches of segment 3 and following longitudinal. Body underside buff yellow. Palps with ventral scales of 2nd segment very long, mostly buff-yellow. Tibiae and 1st tarsal segments with lengths in the same proportions as in Cocytius lucifer. Hindwing upperside with discal area semitransparent.
Male genitalia: Uncus strongly compressed, carinate dorsally, apex sharply curved ventrad. Gnathos very short, similar in size and position to that in Manduca trimacula, the lobe shorter than broad, truncate, with angles rounded. Valve with no tuft of long bristles near the harpe. Harpe similar to that in Manduca ochus, with a curved ventral process and a flat, dentate upper ridge; no tuft of long bristles. Phallus with 2 small teeth, one near the apex, the other more proximal.
Female genitalia: Sterigma mesially convex, laterally recurved, forming rather prominent ridges. Ostium bursae subapical.
A video showing the adult defensive posture and behaviour of a male Amphimoea walkeri at La Selva Biological Station, Costa Rica, by Christian Alessandro Perez can be seen here.