Flight records for this Hepialid are from March until June, with May the main month, and right on cue, on a night with light rain, about a dozen came into the house lights. After photos the lights were extinguished to allow them to go about their business of putting the next generation into production. Australis is very similar to dirempta, but can be identified by the longer rami on the antennae, up to three times the width of the shaft. (MOV 6)
Female.
Males.
The larvae feed on the roots of acacias, five species of which are garden subjects. A search for empty pupa cases under the acacias revealed that the Snowy River Wattle, Acacia boormanii was the host, a rough count coming to twenty five.
Case beside exit hole.
