At Sapporo, Hokkaido, adults of C. elisae begin to emerge in field from late June to July, and copulation takes place during July to Aug. The female attaches the posterior end of egg to the bottom of a burrow which is dug with the ovipositor and closed with soil after oviposition. The larva assumes full coloration within 4 hrs. and leaves the egg-chamber within 2 days. There are 3 larval instars. In late Oct. or early Nov. the larva (usually in the 2d or 3d instar and occasionally in the 1st instar) commences to hibernate, closing its burrow at the top. The larvae become active again in April or May of the next year. Larvae in the 3d instar become adults from June to July, while those in the other instars hibernate again in the 2d winter. Before pupation the larva digs a new oblique side-chamber near the top of the old larval burrow in which the pupal ecdysis occurs. The whole process of pupation takes about 20 min. The pupa-cell, closed at the top, is cylindrical or oval in outline.