Xylophanes tersa
Similar in general appearance to Xylophanes indistincta but immediately distinguishable by the lack of basal black patches and pale dorsal lines on the abdomen. In the BMNH, there are several melanic specimens from the Galapagos Islands that have the uppersides of the wings and abdomen strongly suffused in black (cf. Xylophanes tersa chaconi). Abdomen with three darker dorsal lines, the areas between not contrasting with the general ground colour and not standing out as conspicuously paler (so similar to the pattern in Xylophanes crotonis); abdomen without black basal patches; spines of abdominal tergites uniseriate. Outer spur of midtibia longer than inner. Pale yellow spots of hindwing upperside medial band generally well developed, sharp, triangular and increasing is size towards the apex. In many (but not all) moths from Cuba and Jamaica, these spots are often strongly reduced, even vestigial, but individual specimens of similar appearance occur in most populations of Xylophanes tersa tersa.
Male genitalia: Uncus sinuate. Gnathos slender, pointed. Harpe nearly even in width to near tip, dentate dorsally. Apical process of phallus thickened; right lobe ending in a short dentate process; left lobe comprising a low ridge that extends anteriorly and bears a single row of teeth.