DrMetcalf provides online access to information on cicadas, leafhoppers, planthoppers, spittlebugs, and treehoppers, including a searchable bibliographic database for retrieving literature on these groups. The database includes nearly 12,000 early publications (1741-1955). Because the focal groups are common and widespread, users may find the database helpful for retrieving many older works on insects in general. DrMetcalf also includes an overview of the group Auchenorrhyncha and each of its major subgroups. These overviews present information on distribution, morphology, ecology and behavior, as well as selected links and selected references published since 1955 (some by Metcalf).