''Perimede falcata'' is a

moth Moths are a paraphyletic group of insects that includes all members of the order Lepidoptera that are not butterflies, with moths making up the vast majority of the order. There are thought to be approximately 160,000 species of moth, many of w ...

in the family Cosmopterigidae. It was described by

Annette Frances Braun Annette Frances Braun (1884–1978) was an American entomologist and leading authority on microlepidoptera, a grouping of mostly small and nocturnal moths. Her special interest was leaf miners: moths whose larvae live and feed from within a leaf ...

in 1919. It is found in North America, where it has been recorded from

Ohio Ohio () is a state in the Midwestern region of the United States. Of the fifty U.S. states, it is the 34th-largest by area, and with a population of nearly 11.8 million, is the seventh-most populous and tenth-most densely populated. The sta ...

Massachusetts Massachusetts (Massachusett language, Massachusett: ''Muhsachuweesut assachusett writing systems, məhswatʃəwiːsət'' English: , ), officially the Commonwealth of Massachusetts, is the most populous U.S. state, state in the New England ...

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and

Illinois Illinois ( ) is a U.S. state, state in the Midwestern United States, Midwestern United States. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. Other smaller metropolita ...

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and

Louisiana Louisiana , group=pronunciation (French: ''La Louisiane'') is a state in the Deep South and South Central regions of the United States. It is the 20th-smallest by area and the 25th most populous of the 50 U.S. states. Louisiana is borde ...

. The

wingspan The wingspan (or just span) of a bird or an airplane is the distance from one wingtip to the other wingtip. For example, the Boeing 777–200 has a wingspan of , and a wandering albatross (''Diomedea exulans'') caught in 1965 had a wingspan of ...

is 11.5–14 mm. The forewings are shining grayish white, overlaid with purplish dusting. The hindwings are dusted grayish fuscous.Braun, A., 1919. Notes on Cosmopterigidae, with descriptions of new genera and species (Microlepidoptera). ''Entomological News and Proceedings of the Academy of Natural Sciences of Philadelphia''. p. (263)
/ref> Adults have been recorded on wing year round.

References

* Moths described in 1919 Chrysopeleiinae {{Chrysopeleiinae-stub