This is a list of Lepidoptera (butterflies and moths) observed in the U.S. state of Utah. * Achemon sphinx moth (Eumorpha achemon) * American painted lady butterfly (Vanessa virginiensis) * American snout butterfly (Libytheana carinenta) * Anise swallowtail butterfly (Papilio zelicaon) * Aphrodite fritillary butterfly (Speyeria aphrodite) * Arctic fritillary butterfly (Boloria chariclea) * Army cutworm (Euxoa auxiliaris) * Black cutworm (Agrotis ipsilon) * Black swallowtail butterfly (Papilio polyxenes) * Bordered patch butterfly (Chlosyne lacinia) * Cabbage looper (Trichoplusia ni) * California patch butterfly (Chlosyne californica) * California sister butterfly (Adelpha californica) * California tortoiseshell butterfly (Nymphalis californica) * Callippe fritillary butterfl