A new species of Dalla Mabille, 1904, from Morelos, Mexico (Lepidoptera: Hesperiidae: Heteropterinae)
Dalla amatlanensis Warren, Gott & Legal, sp. nov., is described and illustrated from seven male specimens from the State of Morelos, Mexico. Its apparent larval foodplant is Chusquea circinata Soderstrom & Calderón, based on the observation of an ovipositing female. Based on wing phenotype and male genital morphology, this new species appears to be closely related to Dalla steinhauseri Freeman, 1991, D. bubobon (Dyar, 1921), D. freemani Warren, 1997, and D. austini Warren & De la Maza, 2011, species endemic to Mexico and Guatemala.