The Stink Organs
Published online by Cambridge University Press: 06 April 2009
The stink organs are different in structure and position in the adult and the larval stages.
The stink organs of the adult are composed of (a) a pair of glands, (b) a central reservoir with two backwardly-directed lateral reservoirs, (c) a median kidney-shaped organ in the central reservoir, and (d) a pair of lateral external openings.
Each gland is a multicellular compound structure, opening into the central reservoir. It is described for the first time in this paper.
The whole of the stink organ of the adult is formed in the last larval stage from a pair of invaginations of the epithelial lining of the body-wall.
In the larval stages the stink organs are simple glands, situated dorsally in abdominal segments III to V.
The function of the stink organs is defensive and in the adult perhaps also sexual.