These are rare.
Australian species are small and the sting causes only local pain and swelling.
If these are troublesome, treat by immersing the part of the body stung in fairly hot water to which ammonia has been added. Common Bush Ticks Ticks occur from Queensland to eastern Victoria and in Western Australia. The unengorged tick is bluish-black in colour, oval and flat. Engorged it is golbular and about half a centimetre in diameter. It tends to hide in body crevices.