Additions and corrections to the check list of the Noctuoidea (Insecta, Lepidoptera) of North America north of Mexico IV

A summary of all taxonomic and nomenclatural changes to the check list of the Noctuoidea of North America north of Mexico since the last update published in 2015 is provided. A total of 64 changes are listed and discussed, consisting of 26 recently published changes and additions, and an additional 38 presented herein. One stat. n., one stat. rev., six syn. n., and two comb. n. are proposed for the first time. Orthimella Schmidt & Lafontaine nom. n. is proposed here as an objective replacement name for Himella Grote, 1874 [Noctuinae: Orthosiini], a junior homonym of Himella Dallas, 1852 [Hemiptera: Coreidae].