Abstract
A new species of the bee genus Rhathymus Lepeletier & Serville, 1828 is described and figured as Rhathymus atitlanicus Ayala, Hinojosa-Díaz and Armas-Quiñonez. The new species is from the department of Sololá, Guatemala, and can be distinguished based on the black integument contrasting with the orange color of the wings.
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