Schizocosa mccooki is a member of the wolf spider family Lycosidae and has been found in meadows and open spaces from California to the Great Lakes. They are deft hunters and builders of subterranean silk-lined burrows, their bites can be painful but are non-lethal to humans.
For more information: http://bioweb.uwlax.edu/bio203/f2013/kirchner_alex/index.htm