MARIUS (Petreus) Thetys,
Thetys Butterfly.
Family Nymphalidæ. Sub-family Paphianæ. Genus Marius. Sub-genus Petreus. (Heliconian Type.)
Sub-Generic Character.
Superior wings long, horizontally lengthened; Larva naked, with 3, 4 fleshy filaments on the body.
Specific Character.
See pl. [59].