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A survey of psocopterans in the Zapotitlan Salinas Valley, Puebla, was conducted from October 1994 to October 1995. A total of 582 specimens were collected, representing 25 species, belonging to 15 genera and 8 families (18.38% of the species recorded in the state of Puebla). Six species constitute 67% of the total of specimens collected, and 9 species represent 3.4% of the same total. Twelve species were associated to thorn scrub, 16 were found on izotal, and 6 species were found on Bursera spp. trees. It was found that both richness of species and relative abundance are related to the rainfall regime of the area (r = 0.595 and r = 0.739, respectively).