Callistola dimidiata is a species of beetle of the family Chrysomelidae. It is found on the Solomon Islands (Malaita).
Adults reach a length of about 8.35 mm. They are reddish ochraceous with the posterior two-thirds of the elytra bluish black, becoming pitchy red on the posterior margins. The antennae are reddish basally and at the apex, while the rest is pitchy black.
The recorded host plants for this species are Freycinetia species.