Hydrachna approximata Halík, 1940

Material examined. New South Wales. 1/0/0, Rockpools, Mootwingee Gorge, Mutawintji NP, 31-x-2001; 2/0/0, Wog Wog River, at crossing with Wog Wog Way, 37º 0 4.986 S 149º 29.027 E, alt. 332 m asl, 10-xii-2003; 1/2/0, White Rock River at crossing with Imlay Road, South East Forests NP, 37º 0 8.121 S 149º 21.370 E, alt. 505 m asl, 10-xii-2003. Victoria. 0/1/0, Swamp at junction of Victoria Valley Road and Bundol Road, SW of Grampians NP, 37º 35’14.50” S 142º 18’58.36” E, 30-ix-1997. Queensland. 0/1/0, Rockpool Porcupine Creek, Porcupine Gorge NP, 20º 21.029 S 144º 27.852 E, 23-x-2005; 1/0/0, Small lake Hawkwood Road, 13 km S of Mundaburra, 25º 39.910 S 151º 13.941 E, alt. 130 m asl, 31-x-2005; 0/1/0, South Mimosa Creek, Blackdown Tablelands NP, 23º 47.714 S 149º 0 4.270 E, alt. 802 m asl, 27-xi-2005. Western Australia. 1/0/0, Lake Kununurra, 10 km SE of Kununurra, 15º 52’7.45” S 128º 45’46.75” E, 19-ix-1998; 3/2/3, Lake Campion, 14-x-1998; 5/0/0/, Lake Eda, 30- x-1998.

Remarks. Previously known from Western Australia, New South Wales, Victoria and Tasmania.