This dark beetle is Paropsisterna nigerrima var. picta. The structure is identical to the common striped form but the color pattern is different. The important srtuctural feature to note for ID is the fine striae (puncturation lines) along the elytra. Sadly, the color patterns are no help. The third variety (nigerrima nigerrima) is entirely black. I suspect that at least two more variations occur that are not recorded in the MOV collection. One is entirely light and dark banded, the other is from NSW and has a different red spot pattern.
This beetle is always dark. Close inspection will reveal that it comes in at least two varieties, one entirely black.
The second variety has subtle red lines on the elytra. Another (rare) has brown elytra. This beetle is common and widespread along the east coast including Tasmania. It always has very fine and virtually imperceptible striae puncturations. It has strong foveae on the pronotum (dimples in its cheeks).
These are crepuscular and found most easily under bark of candlebark/manna gum types which offer large spaces for them to hide.
A dark and variable beetle. This variation is "alternata" with alternate interstices containing red stripes.
The striae bear lines of fine puncturations in good alignment.
Easily confused with Paropsisterna morio which has extremely fine to almost non existent striae punctiurations.
These beetles are crepuscular, at least in Victoria and retire under bark during daylight hours.
This species is Peltoschema basicollis. This orange beetle with black spots is clearly a coccinellidae mimic. These beetles are monophagous, obligate feeders on Acacia buxifolia and the beetles were restricted to a small stand of this acacia in a small section of the park. These are easily and commonly mistaken for ladybirds but feature a black suture. There are at least three species of Peltoschema in a complex of ladybird mimic species.
A very common leaf beetle with rows of beading or marbling along the striae of the elytra. The body and legs are always black. The insect is sometimes brown. green, red, orange, yellow or entirely black. The pronotum is typically patterned with a clear patch either side of the centre line.