2 NEW GRASSHOPPERS FROM RELICT UPLANDS OF FLORIDA (ORTHOPTERA, ACRIDIDAE)

Two new species of nightless acridid grasshoppers. Melanoplus nanciae and Melanoplus ordwayae are described from Florida scrub habitat on is olated sand ridges in peninsular Florida. They are members of a group of 5 species that show evolutionary divergence on ''islands'' of scrub . Habitat-specific flightless grasshoppers may be particularly useful in biogeographic analyses because divergence between lineages is quick ly reflected in morphological changes in male genitalia. The two new s pecies are examples of arthropods that are not even named before their habitat is mostly destroyed.