About the Author

ROBERT G. FOOTTIT is a research scientist specializing in the taxonomy of aphids and related groups, with the Canadian National Collection of Insects and Agriculture and Agri-Food Canada. His research interests include the use of morphological and molecular approaches in the study of aphid species and populations.

PETER H. ADLER is a professor of entomology at Clemson University, where he holds a teaching and research appointment, specializing in the behavior, ecology, genetics, and systematics of insects, particularly butterflies and medically important flies.