A STUDY OF ADULT MORPHOLOGY IN MEGALODACNE HEROS (SAY) (COLEOPTERA, EROTYLIDAE)

A morphological study of the adult form of Megalodacne heros (Say) (Co leoptera: Erotylidae) was undertaken. Illustrations and descriptions a re provided for various aspects of the anatomy including the internal and external skeletal features, digestive system, nervous system, prot horacic glandular system, and the reproductive systems of both sexes. The morphology is discussed with reference to function and natural his tory. Comparisons are made to other erotylid species with special emph asis on congeners. Seasonal variation in some internal anatomical feat ures is described. Several intraspecific polymorphisms and sexual dimo rphisms are described.