Occidentalia

Occidentalia is a monotypic moth genus of the family Crambidae described by Harrison Gray Dyar [Jr.] and Carl Heinrich in 1927. It contains only one species, Occidentalia comptulatalis, described by George [Duryea Hulst] in 1886. It is found in North America, where it has been recorded from Alberta, Indiana, Maine, Manitoba, Minnesota, New [York (state)|New York], Ontario, Quebec and Saskatchewan.
The wingspan is 23–26 mm. Adults are on wing from mid-July to August in one generation per year.
The larvae feed on Scirpus acutus, Scirpus americanus and Scirpus validus.