Venomous brown widow spiders invade San Diego and elsewhere
A spider orignally from the tropics. Large abdomen like a black widow, but brown-colored and somewhat smaller. Has orange hour-glass mark on bottom of abdomen. Prolific bastards. I have found dozens around my house in La Mesa (eastern suburb of San Diego). They arrived about a year ago. Found only one black widow in nine years in the same location.
More general information on widow spiders: badspiderbites.com
Invasion of brown widows into Gulf Coast and Mississipi: homeschoolblogger.com