A new species of Hypoprepia from the mountains of central Arizona (Lepidoptera, Erebidae, Arctiinae, Lithosiini).

A new firefly-mimicking lichen moth of the genus Hypoprepia, H. lampyroides Palting & Ferguson, sp. n., is described from the mountains of east-central Arizona and the Sierra Madre Occidental of Mexico. Hypoprepia Hubner, 1831 is a North American genus of lithosiine tiger moths, previously consisting of five species: H. fucosa Hubner, 1831 and H. miniata (Kirby, 1837), both of eastern and central North America; H. cadaverosa Strecker, 1878 from the Rocky Mountains into New Mexico and west Texas: H. inculta H. Edwards, 1882, a widespread western USA species and H. muelleri Dyar, 1907 from the vicinity of Mexico City. The latter is herein synonymized under H. inculta (= H. muelleri syn. n.), resulting in the total number of taxa in the genus unchanged at five.