(Archaeosynthemis leachii)
Archaeosynthemis leachii is a species of dragonfly of the family Synthemistidae, known as the twinspot tigertail. It is a medium-sized dragonfly with black and yellow markings. It inhabits streams, seepages and swamps in south-western Australia. Archaeosynthemis leachii has been known as Synthemis leachii. Archaeosynthemis is a genus of dragonflies in the family Synthemistidae. Species of Archaeosynthemis are found across southern Australia. They are medium-sized dragonflies with black and yellow markings.