I hit a conga line of these guys with the mower this morning:-
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that line went right under the ute and onto the roadway on the other side - they were coming from a bit of bush across the road
didn't think anything of it as they'd never bothered me in the past - then about 5 minutes later the itching started - by the time I'd finished the lawn I was scratching my skin off and had to head home, shower, put all my clothes in to soak and gerni off the catcher and mower -
I googled remedies to stop the itching and was surprised to find none of the usual tips about vinegar etc - go to the docs for steroid creams or just wait it out - I did 3 more jobs and it didn't bother me when working but I'm sitting here scratching now
If you see them give them a wide berth I reckon.