Two new species of Elaphopsocoides n. gen. from Valle del Cauca, Colombia, are here described and illustrated. The new genus is related to Elaphopsocus Roesler, but differs from it mostly in the hypandrial projections and in phallosome structure. The female subgenital plate has a distinct, median, posterior projection. The types are deposited in the Entomology Museum, Universidad del Valle (MUSENUV), Santiago de Cali, Colombia.
A monotypic genus of Psocidae (Amphigerontiinae: Blastini) from Santiago de Cali, Colombia, is here described and illustrated. It differs from Chaetopsocidus Badonnel, from the Páramo de Monserrate, near Bogotá, in having setae on the forewing veins.
Six new species of Elaphopsocus Roesler from Brazil and Colombia are described and illustrated. Revised generic diagnoses are provided for Elaphopsocoides and Elaphopsocus; based on the structure of the male hypandrium and phallosome three species groups are recognized in Elaphopsocus.
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