Abstract
AS anyone who has ever passed a summer evening on a country porch will attest, moths are a highly varied group. The order Lepidoptera, besides butterflies, includes over 10,000 primarily nocturnal species of moths in North America and Mexico alone. Despite this great variety, a little over half of the 50 existing publications on moth thermoregulation concern just one family, the Sphingidae (commonly called “sphinx” or “hawk moths”), and 10 of these papers are on a single species, the common tobacco hornworm moth, Manduca sexta (formerly Protoparce). At a weight of 2 to 3 grams, M. sexta is one of the relatively large sphingids, a distinct advantage for a biologist seeking information on the physiology of body-temperature regulation of an insect.
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