Cuticular structures on the labium of the larva of Crocothemis servilia (Drury) (Anisoptera: Libellulidae)

The various types of sensilla occurring on the labium are described with the help of scanning electron microscopy. In addition to bristles and spines, various sensilla trichoidea are located on the ligula and the palps. The palps also contain sensilla basiconica, a row of papillae and simple pits. The possible functional roles played by these types of sensillum in the life of C. servilia are discussed.