SE REVISA LA FAMILIA CYDNIDAE (HEMIPTERA-HETEROPTERA) PARA MÉXICO , REPRESENTADA POR 12 GENEROS: AMNESTUS DALLAS, CYRTOMENUS AMYOT & SERVILLE, DALLASIELLUS BERG, ECTINOPUS DALLAS, MELANAETHUS UHLER, MICROPORUS UHLER, PANGAEUS STâ€L, PROLOBODES AMYOT & SERVILLE, RHYTIDOPORUS UHLER, TOMINOTUS MULSANT & REY, SCAPTOCORIS PERTY, SEHIRUS AMYOT & SERVILLE, PERTENECIENTES A CUATRO SUBFAMILIAS: AMNESTINAE, CYDNINAE SCAPTOCORINAE, SEHIRINAE; SE INCLUYEN DATOS DE DISTRIBUCIÓN DE CADA GENERO, UNA CLAVE PARA SEPARAR GÉNEROS Y SUBGÉNEROS, UN LISTADO DE LAS ESPECIES CONOCIDAS, Y SE ILUSTRAN LOS CARACTERES MORFOLÓGICOS DE CADA GENERO.THE FAMILY CYDNIDAE (HEMIPTERA-HETEROPTERA) FROM MEXICO IS REVISED; 12 GENERA ARE REPRESENTED: AMNESTUS DALLAS, CYRTOMENUS AMYOT & SERVILLE, DALLASIELLUS BERG, ECTINOPUS DALLAS, MELANAETHUS UHLER, MICROPORUS UHLER, PANGAEUS STâ€L, PROLOBODES AMYOT & SERVILLE, RHYTIDOPORUS UHLER, TOMINOTUS MULSANT & REY, SCAPTOCORIS PERTY, SEHIRUS AMYOT & SERVILLE, BELONGING TO FOUR SUBFAMILIES: AMNESTINAE, CYDNINAE, SCAPTOCORINAE AND SEHIRINAE. DISTRIBUTION, KEYS TO GENERA AND SUBGENERA AND A LIST OF THE KNOWN SPECIES ARE INCLUDED; THE MORPHOLOGICAL CHARACTERS FOR EACH GENERA ARE ALSO ILLUSTRATED.