This division includes the single family of the Phasmidae whose members, generally known as " stick-insects " (q.v.) and " leaf-insects " (q.v.), are among the best-known examples of " protective resemblance " to be found in the whole animal kingdom.
Westwood, Catalogue of Phasmidae (London, Brit.
STICK - INSECT, the name given to certain orthopterous insects of the family Phasmidae, of extremely variable form and size, and deriving their name from a resemblance to the branches and twigs of the trees in which they live and feed.