The duration of all pre-imaginal stages of Epierus divisus Marseul was
determined. This is the first developmental study for Epierus Erichso
n. At 25 degrees C, the egg stage was completed in 10-12 days, that of
the first instar larva in 8-15 days, the second instar in 6-8 days, t
he prepupa in 7-8 days, and pupa in 10-12 days. Developmental rates of
the subcortical E. divisus were compared directly to the dung/carrion
-associated histerid Euspilotus assimilis (Paykull) and found to be si
gnificantly longer for all developmental stages. Developmental rates o
f E. divisus were also compared to developmental rates reported in the
literature for several other species of histerids that develop in ass
ociation with ephemeral systems.