Social: living in communities: more especially those species in which undeveloped or worker forms occur and where the colony has a single female head.
Soldiers: in termites; forms sexually undeveloped, in which the mandibles are pincer-like and the head is much enlarged: worker majors in certain ants.
Solid: applied to an organ usually jointed, when these joints form into one mass; e.g. the capitulum of certain clavate antennae.
Solitary-arius: occurring singly or in pairs; not in colonies.
Somatic: relating to the body, or abdomen.
Somatotheca: that part of pupa covering abdominal rings:= gasterotheca.
Somite: = arthromere.
Sonifaction: the production of sound: = stridulation; q.v.
Sonoran faunal areas: see upper and lower Sonoran.
Sonorific: sound producing: applied to stridulating organs.