That looks like Olivias legs at the moment and we are down here in Melbourne. She is a magnet for them. Her and her sister were sitting next to each other on the lounge when a mozzie bit her 17 times and did not touch her sister. What happens with Liv is that she scratches them hard and picks at them, sometimes not even realising it. With her bites she initially has the large red lump then it goes quickly and leaves a smaller lump..... which gets scratched.
I use stingose on her, although she doesnt like it. I want to find a plant to put outside the doors for a natural repellant.