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Dasythrips chiapensis sp. n. is the third species known in Dasythrips, a genus formerly known only from Perú; the new species was taken near Bochil, Chiapas, Mexico. The head, prothorax, forelegs, right antenna and tube are illustrated and measurements are included. Only females were available for study. The types were deposited at the Entomology Collection, Instituto de Biología, Universidad Nacional Autónoma de México, and Museo de Historia Natural de la Ciudad de México and California Academy of Sciences, San Francisco, California, U. S. A. Dasythrips chiapensis sp. n. es la tercera especie que se conoce en el género Dasythrips, conocido solamente de Perú. D. chiapensis fue colectado cerca de Bochi, Chiapas, México. Se presentan ilustraciones de la cabeza, protórax, patas anteriores, antena derecha y tubo, así como medidas de ejemplares de esta especie, de la que, hasta ahora, se conocen sólo hembras. Los tipos se encuentran depositados en la Colección de Entomología del Instituto de Biología de la Universidad Nacional Autónoma de México, en la del Museo de Historia Natural (México, D. F.) Y en la de California Academy of Sciences, San Francisco, California, EE.UU.

This is a review of the Mexican species Frankliniella curiosa Priesner, together with the description of eight new Mexican related species. Ihe outstanding morphology of antennal segment III in the adults, with a ventral projected and curved beak (which covers the pedicel), is an exclusive and typical character, which allows their separation into a new and different species group in the genus . Sorne other morphological characters divide the group in four species assemblages. Illustrations of!he head, antennae, thorax and abdomen of each species are included. Ihis is a review of the Mexican species Frankliniella curiosa Priesner, together with the description of eight new Mexican related species. Ihe outstanding morphology of antennal segment III in the adults, with a ventral projected and curved beak (which covers the pedicel), is an exclusive and typical character, which allows their separation into a new and different species group in !he genus . Sorne other morphological characters divide the group in four species assemblages. Illustrations of!he head, antennae, thorax and abdomen of each species are included.