MORPHOLOGICAL VARIATION IN ELAPHRUS-CLAIRVILLEI KIRBY (COLEOPTERA, CARABIDAE) FROM FOSSIL SITES IN THE GREAT-LAKES REGION

The ground beetle Elaphrus clairvillei Kirby occurs in two physically- distinct forms in Pleistocene and Holocene fossil sites. Each variety has a peculiar modern distribution, one mon northern than the other. w ith little range overlap, Seven paleoentomological sites from the Grea t Lakes region were analysed to determine whether a correlation exists between the form of E. clairvillei present and the climate indicated by other insects. The northern form was only present in cold-climate s ites, while the southern variety was found in sites deposited under wa rmer-climate conditions.