Variabilidad y registros nuevos para México de Pleotomus pallens (Coleoptera: Lampyridae: Pleotomini)

PLEOTOMUS PALLENS SHOWS GREAT VARIABILITY IN THE MORPHOLOGY OF ANTENAE, PRONOTUM, ELYTRA, MEMBRANUS WINGS, GENITALS, SIZE AND COLOR. THE RANGE OF VARIATION IS ILLUSTRATED AND A TABLE OF ALLOMETRIC VARIATION IS PRESENTED. AS A RESULT OF STUDY OF THE VARIABILITY OF P. PALLENS, THE SPECIES IS REDESCRIBED, AND THE NAME P DAVISII LE CONTE, 1981 AND O. NIGRIPENNIS LE CONTE 1985 FALL IN THE SYNONIMY OF P. PALLENS. A MAP WITH THE KNOW DISTRIBUTION IN MEXICO OF P PALLENS IS PRESENTED.