HemigomphusHemigomphus is a genus of dragonflies in the family Gomphidae, endemic to Australia.The species are small with black and yellow markings. They are commonly known as vicetails.SpeciesThe genus Hemigomphus includes the following species:Hemigomphus atratus - black vicetailHemigomphus comitatus - zebra vicetailHemigomphus cooloola - Wallum vicetailHemigomphus gouldii - southern vicetailHemigomphus heteroclytus - stout vicetailHemigomphus magela - Kakadu vicetailHemigomphus theischingeri - rainforest vicetail