Resumen

A revision of Leucotrichia (Trichoptera, Hydroptilidae) is provided, including a generic diagnosis, illustrations, a key, and descriptions of males. A total of 43 species are treated, 13 described as new: Leucotrichia angelinae sp. n. (Venezuela), L. denticulata sp. n. (Mexico), L. dianeae sp. n (Costa Rica), L. fulminea sp. n. (Ecuador), L. hispida sp. n. (Costa Rica), L. kateae sp. n. (Venezuela), L. pectinata sp. n. (Ecuador), L. procera sp. n. (Brazil), L. repanda sp. n. (Venezuela), L. rhomba sp. n. (Costa Rica), L. riostoumae sp. n. (Ecuador), L. sidneyi sp. n. (Venezuela), and L. tapantia sp. n. (Costa Rica).