5 CONCLUSION
We investigated, by means SEM, the external morphology and distribution
of the oral appendages of G. cantor . We find that the gross
morphology and ultrastructural morphology of mandible, labial and
mandibular palpus are significantly different between sexes of G.
cantor using scanning electron microscopy. Observation of the gross
morphology of the mandible, labial palpus and mandibular palpus revealed
that their lengths were significantly greater in females. In terms of
the ultrastructural morphology of the mandibles, females have
significantly more ST I and SCh III on their mandibles than males. The
mechanical sensors SCh and Bb, olfactory sensor ST II, taste sensor STB
IV, and carbon dioxide sensor and temperature and humidity sensors SC,
SP and SCa were significantly more developed on female than male labial
and maxillary palps. These play an important role in reproductive
behavior to provide new insights for the pest control and forest
protection.