Abstract
Luciola parvula (Coleoptera, Lampyridae) is a terrestrial
firefly species widely distributed in Japan. Previous studies reported
that there were two ecological morphs of adults of this species: large
and small morphs. However, the procedure used to identify the two morphs
has remained ambiguous and confused. The present article provides a
brief review of the two morphs in this species and then proposes an
allometric approach to detect the existence of the two morphs.