Many species from all families of Rhopaloccra have been reported to drink water (Norris 1936). Bates (1863) noted that, in the Amazon, 80 species from 22 genera flocked about the damp edges of water and, with very few exceptions, all of these individuals were males.
Scriber, J. Mark
"Puddling by Female Florida Tiger Swallowtail Butterflies, Papillo Glaucus Australis (Lepidoptera: Papilionidae),"
The Great Lakes Entomologist: Vol. 20
, Article 2.
Available at: http://scholar.valpo.edu/tgle/vol20/iss1/2