These spiders belong to the same family of comb footed spiders as the redback and brown widow. Steatoda</EM> species have shiny, slender legs, with a small cephalothorax and a larger abdomen, which is somewhat egg-shaped in Steatoda. Mature females grow to about 1.2 cm, while the males are slightly smaller. The colour can range from a brown or reddish plum to satiny black. The abdomen often has white or beige spots, a frontal crescent, and sometimes, small red spots or a thin red line (but never a stripe like a Redback Spider). They build a tangled-looking web with sticky lines (a gum-footed web) under rocks, timber and bark in the bush. Bites from Steatoda species occur infrequently. The bite of the brown house spider is not lethal, but may cause headaches or nausea. Small blisters may occur around the bite site. It can be treated with Red back antivenom.