About Occidentalia comptulatalis Hulst, 1886
Occidentalia is a monotypic moth genus in the family Crambidae, described by Harrison Gray Dyar Jr. and Carl Heinrich in 1927. This genus contains only one species, Occidentalia comptulatalis, which was originally described by George Duryea Hulst in 1886. The species is found in North America, and has been specifically recorded from Alberta, Indiana, Maine, Manitoba, Minnesota, New York, Ontario, Quebec, and Saskatchewan. Its wingspan measures 23–26 mm. Adult moths are active from mid-July to August, and produce one generation per year. The larvae of Occidentalia comptulatalis feed on Scirpus acutus, Scirpus americanus, and Scirpus validus.
