[From the February 2013 issue of the UC IPM Green Bulletin newsletter]
During the last 10 years, a new widow spider has moved into parts of Southern California. The brown widow spider, Latrodectus geometricus, is closely related to the well-known black widow spider, L. hesperus, (Figure 1) that occurs throughout much of California.
A recent survey of widow spiders in Southern California led by retired UC Riverside entomologist Richard Vetter revealed new information about the distribution of brown widows. Currently brown widow spiders.../span>