A new species of Archithosia Birket-Smith, 1965 in the subgenus Eurythosia Krüger, 2015 from Uganda (Lepidoptera: Erebidae: Arctiinae: Lithosiini) Author Durante, Antonio Museo di Storia naturale del Salento. S. P. Calimera-Borgagne, Km 1, 73021 Calimera, Italy Author Potenza, Luigi Museo di Storia naturale del Salento. S. P. Calimera-Borgagne, Km 1, 73021 Calimera, Italy Author Pellegrino, Gabriele Museo di Storia naturale del Salento. S. P. Calimera-Borgagne, Km 1, 73021 Calimera, Italy text Zootaxa 2024 2024-08-06 5492 3 356 368 http://dx.doi.org/10.11646/zootaxa.5492.3.4 journal article 10.11646/zootaxa.5492.3.4 1175-5326 13234883 54F5ECF4-C148-4AB3-9F2C-F3B066B55825 Key to the species of the subgenus Eurythosia (based on male genitalia) The following keys do not include Archithosia jaundeana , as the holotype lacks the abdomen and its genitalia are unknown; see also the Discussion. Characters in the key are shown by arrows in Table 1. 1 Ala valvae with saccular distal process bent inwards and well developed......................................... 2 - Ala valvae with saccular distal process absent or barely visible......................................... A. derelicta 2 Ala valvae with a strong median process bent inwards.............................................. A. kinuthiae - Ala valvae without such a process........................................................................ 3 3 Supravalva with a strong medially arising costal process........................................... A. angulifascia - Supravalva without such a process........................................................................ 4 4 Distal process of the ala valvae as long as 1/3 of the entire ala valvae................................. A. makomensis - Distal process of the ala valvae as long as 1/4 of the entire ala valvae............................... A. henricus n. sp.