This beetle is named Paropsisterna agricola.
It is common in Tasmania it can become an agricultural pest.
The pale skirt can be bright red in some specimens.
This species is determined by the black markings on the pronotum and the elytra with some flaring at the base.
This variable species is Paropsisterna lignea. It may have three dots on the pronotum and be strongly lined or entirely unlined elytra. It seems to be common in alpine habitats.
There are interstitial puncturations (pitting between the rows of grooves) of random positioning but of equal size as the striae puncturations. (see close-up.)
This beetle is a small yellow leaf beetle which seems similar to Paropsisterna variicollis. The elytral striae have a series of puncturations each with a small black dot. These were only seen in a single location. This beetle is illustrated on PaDIL from where I have derived the identification. http://bie.ala.org.au/species/Paropsisterna+inspersa#tab_gallery