Welcome to the Spiders of the Californias website.  This is a project under development as time allows.  The intent is to eventually provide you with photos and information relating to the spiders of San Diego and Imperial Counties, California, USA, as well as Baja California and Baja California del Sur, Mexico.  Suggestions and corrections can be addressed to Jim Berrian at


Species pages are provided in English and Spanish.  The Spanish translation was kindly provided by Arlene Alvarado.  Arlene, formerly a student at Southwestern Community College, Chula Vista, California, is currently an undergrad student at Humboldt State University, Arcata, California.  I met here when she was a student intern in the Entomology Department at the San Diego Natural History Museum, San Diego, California.  Many thanks to Arlene.