<Li> Latrodectus variegatus Nicolet, 1849--Chile, Argentina </Li> <Li> Latrodectus variolus Walckenaer, 1837--US, Canada </Li> <P> Widow spiders can be found on every continent of the world except Antarctica . In North America, the black widows commonly known as southern (Latrodectus mactans), western (Latrodectus hesperus), and northern (Latrodectus variolus) can be found in the United States, as well as parts of southern Canada--particularly in the Okanagan Valley of British Columbia, as can the "gray" or "brown widow spiders" (Latrodectus geometricus) and the "red widow spiders" (Latrodectus bishopi). The blue mud dauber (Chalybion californicum) is a wasp that, in the Western United States, is the primary predator of black widow spiders . </P> <P> The most prevalent species occurring in Australia is commonly called the redback (Latrodectus hasselti). </P>

Where do you find the black widow spider