Records of species and number of specimens of Lepidoptera, obtained from monthly sampling in a small plot of half a hectare, located in the southwest of the Iberian Peninsula, within the Natural Park of the Sierra de Aracena y Picos de Aroche, are offered. The first records of the new species Agnoea corteganensis Bernab?, Huertas, Jim?nez and Vives, 2024 (Gelechioidea-Lypusidae) are included. More information in: Bernab?-Ruiz, P.M., Huertas-Dionisio, M., Jim?nez-Nieva, F.J., & Vives Moreno, A. (2024). Biodiversity of Lepidoptera in a mid-mountain site in the southwest of the Iberian Peninsula. 2017-2019 Annualities. description of the species Agnoea corteganensis Bernab?, Huertas, Jim?nez & Vives, sp. nov., from Huelva, Spain (Insecta: Lepidoptera). SHILAP Revista de lepidopterolog?a, 52(205): 33-66. https://doi.org/10.57065/shilap.845