New synonymies and combinations in Argyrostrotis Hübner (Lepidoptera, Erebidae, Erebinae, Poaphilini)

Abstract. After examining the type specimens of species in the eastern North American genus Argyrostrotis the number of known species in the genus is reduced from 10 to six through synonymy. A key to species is included along with illustrations of the adults and genitalia of each species. Three Neotropical species currently included in Argyrostrotis (Argyrostrotis eurysaces Schaus, 1914; Argyrostrotis quadrata Dognin, 1910; and Celiptera surrufula Dyar, 1913) are transferred to other genera as Argyrosticta eurysaces (Schaus, 1914), comb. n. [Noctuidae: Bagisarinae], Heterochroma quadrata (Dognin, 1910), comb. n. [Noctuidae: Amphipyrinae], and Ptichodis surrufula (Dyar, 1913), comb. n. [Erebidae: Erebinae: Euclidiini].