The Relative Size of the Eye as a Phase Character in the African Migratory Locust

Abstract

The relative size of the compound eye constitutes a good phase character in Locusta migratoria migratorioides, the ratio E/D (length of elytra to the maximum vertical diameter of eye) being over 15 in the males and about 16 in females of the gregarious phase, as against about 13 in the males and about 14·5 in the females of the solitary phase.