1. Colour discrimination in insects;Burkhardt,1964
2. Imaginal behavior of a Trinidad butterfly, Heliconius erato hydara Hewitson, with special reference to the social use of color;Crane;Zoologica (N.Y.),1955
3. Imaginai behavior in butterflies of the family Heliconiidae: Changing social pattern and irrelevant actions;Crane;Zoologica (N. Y.),1957
4. On certain habits of Heliconia charitonia Linn., a species of butterfly found in Florida;Edwards;Papilio,1881