Holzenthal, Ralph W.Harris, Steven C.2018-05-042018-05-041992Holzenthal, R. W., & Harris, S. C. (1992). Hydroptilidae (Trichoptera) of Costa Rica: the genus Oxyethira Eaton. Journal of the New York Entomological Society, 100(1), 155-177. Holzenthal, R. W., & Harris, S. C. (1992). Hydroptilidae (Trichoptera) of Costa Rica: the genus Oxyethira Eaton. Journal of the New York Entomological Society, 100(1), 155-177.https://hdl.handle.net/11299/196339Nine new species of Oxyethira (Trichoptera: Hydroptilidae) are described from Costa Rica: 0. apinolada, 0 . cuernuda, 0. culebra, 0. espinada, 0. hilosa, 0. rareza, 0 . sencilla, 0. sierruca, and 0. tica. Males of each new species are described and figured. In addition, distribution records are presented for eight previously described species occurring in Costa Rica: 0. arizona Ross, 0. azteca (Mosely), 0. costaricensis Kelley, 0. glasa (Ross), O.janella Denning, 0 . parazteca Kelley, 0. parce (Edwards and Arnold), and 0. simulatrix Flint. A key is provided to males of the Costa Rican species.enArticle