Green-colored hatchlings appeared in the 2nd generation of inbred family lines in Locusta migratoria L. Female adults collected in Tsukuba, Japan were kept individually and eggs collected from them. Locusts of the first generation from each female were reared in a group and eggs of the 2nd generation obtained from them. Green and normal-colored (fawn) hatchlings appeared together from the same egg pods, originating from 2 of the 34 family lines established. When they were reared together in the same cage, the green morph suffered from a high rate of mortality. A few green-morph female individuals attained the adult stage with light body coloration, but died without producing any eggs. Although no information is available about their genetic background, it seems likely these green morphs represent a recessive, semilethal trait that appeared after inbreeding of wild-caught female adults. Photographs of hatchlings, nymphs and adults are presented.
