Hydrachna triscutata Lundblad, 1947

Material examined. Western Australia. 1/0/0, Mc Kenzie Spring, Millstream-Chichester NP, 21º 20’17.52” S 117º 12’37.79” E, 17-viii-1994.

Remarks. The male from this study is a bit larger (L/W 1568/1206, dorsal plate L/W 1407/884), but matches the description of Lundblad (1947) well. Previously known only from one male from New South Wales.