An ice pack may be used to relieve the pain of the sting.
However they are not aggressive and are unlikely to use their venom on humans unless extremely provoked. Spider wasps have a potentially painful sting. This black and yellow banded wasp can be easily distin- guished from a hornet by its cylindrical body and its long and entirely yellow antennae. This behaviour is known as klepto-parasitism (klepto: Ancient Greek for 'theft'). A small number of Spider Wasps steal spiders from other Spider Wasps for their own larva. The spider is left where it was stung and the larva hatches and eats the spider. Some spider wasps sting the spider and lay an egg on it but do not dig a burrow to put it in. The larva hatches and feeds on the body of the spider before pupating in a thin silky cocoon in the cell. She then lays an egg on the spider's body, and seals it in a chamber or cell at the end of the burrow. On finding the spider, which may be as large as a huntsman or funnel-web and twice as heavy as itself, the wasp stings and paralyses it, and then drags or flies it back to the burrow. They dig a burrow using long spines on their front legs, then search rapidly around tree trunks and on the ground for a spider. The spider wasps you are most likely to see and hear are female wasps preparing nest chambers for their larvae. The wasp does this when searching for a spider in bark, cracks, crevices or soil. Spider wasps have a habit of flicking their wings on landing and moving with a jumping motion. Others have scales that help them walk on spiders' webs, allowing them to sneak up and attack the owner. Some species are known to bite off the legs of large hairy spiders, trimming them to make them easier to handle. Spider wasps are often seen digging in soft sandy soil, dragging huntsman spiders along.
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