Xylophanes tyndarus is a moth of the family Sphingidae first described by Jean Baptiste Boisduval in 1875.

It is distributed from Mexico and Belize to Brazil and westward into Bolivia.

The postmedian line is well marked, straight, the basal edge is sharply delineated, the distal edge is diffuse and it is gradually lightening toward the outer margin.

In Costa Rica, adults have been recorded from November to February and again from April to July.

Early instars are green with yellow eyes, and feed solely on new leaves.