FEMALE MORPHS OF THE DAMSELFLY ENALLAGMA-BOREALE SELYS (ODONATA, COENAGRIONIDAE) - A BENEFIT FOR ANDROCHROMATYPES

Females of the coenagrionid damselfly Enallagma boreale Selys occur as three distinct colour morphs at a study site in eastern Ontario, Canada; > 65% are blue (termed androchromatypes) like the conspecific male, ca. 30% are green, and < 5% have both blue and green on their abdomen. I provide experimental evidence which suggests that one advantage of androchromatypism is avoidance of harassment from heterospecific males of the congeneric damselfly Enallagma ebrium (Hagen).