However, there are also many experimental data that
do not corroborate Dyar’s assumptions8
. It is indeed surprising
that Dyar’s coefficient showed spectacular constancy
within a given set of studies and among individual
organisms therein. Therefore, it is proposed that the
length of the largest stick, although an inanimate object,
used by the bagworm larva during each episode of case
renovation could be taken as a marker to ascertain the
state of development of the bagworm moth (instar?) in a
non-invasive manner. Further, E. crameri seems to pass
through at least four instar stages before entering into the
pupal stage, and it renovates its case between each transition
from one instar stage to the subsequent one.