Abstract
In June and July 1990, first-generation larvae of the rice-plant skipper, Parnara guttata guttata, which has never been recorded previously in Miyagi Prefecture, were observed on rice plants mainly in the south part of the prefecture where winter is thought to be too severe for larval hibernation. The date of oviposition estimated from the date of pupation in the paddy fields was mid-May to early June. This is believed to be too early to be the result of oviposition by hibernating population in this prefecture which suggests the possibility of immigration by adults of overwintered-generation from southern Japan.
