Abstract
The sexual behaviour of a gynandromorphic spider of the salticid species, Carrhotus xanthogramma (LATREILLE, 1819), was observed in laboratory. The individual has a male right palp and a simple left one as in female. The left side of abdomen is expanded and shows the female characteristics with a deformed epigynum, while the right side seems to be a male. This gynandromorphic salticid spider took the antagonistic behaviour to a normal male of the same species, and presented the courtship towards a normal female and inserted the only right palpal organ into the female genitalia at the copulation. However, a normal male presented the courtship behaviour towards the gynandromorph which was motionless under anesthetic by CO2.
