Urania sloanus is only recorded to eat Jamaican Cobnut, Omphalea triandra. However, like other Urania spp. it may have been oligophagous on Omphalea spp. (Euphorbiaceae).
Omphalea triandra is widespread on limestone substrates in Jamaica (Adams, 1972) and is recorded at:
O. triandra is reported in error from Cuba (by Macleay, 1834, whose illustration shows Omphalea trichotoma: Lees and Smith, 1991)
There are also two lowland records on (www.tropicos.org) for Dominican Republic.
Surprisingly, no natural adult nectar resources are recorded, but other planted fruit trees were avoided (Gosse, 1851).