A new Anagrus important in the biological control of Stephanitis takeyai and a key to the North American species

A new species of Anagrus Haliday is described, and biological information is provided regarding the parasite's effectiveness in attacking eggs of the introduced tingid Stephanitis takeyai Drake and Maa. We suspect that the parasite was fortuitously introduced with its host and that it is not an endemic Anagrus. The parasite has the capability of reducing host egg populations by at least 35% in Connecticut. A key to the 6 species of North American Anagrus is given and taxonomic comments are made on these species.