Blue-tipped dancer damselflies, mating

Adult males are unique, with purple face and upper thorax and all-black abdomen except for s9–10 blue. Females may be generally brown or blue, or very rarely green. They almost always have a thin black dorsal stripe and a thick black shoulder stripe with a fork near the wing bases, and inside the fork is a triangle of color the same color as the thorax. Rarely, a female will have a thinner dorsal stripe and a thinner, just slightly forked shoulder stripe as at middle right.