Black Widow Spider

The black widow is shiny and black, with long legs (total width 1 inch). A red (or orange) hourglass-shaped marking may be on its underside (not present in all Lactrodectus species).

From the CDC's Public Health Image Library (http://phil.cdc.gov), ID#5449, in the public domain.

Brown Recluse Spider

• This is a photo of the Brown Recluse Spider (Loxosceles reclusa)
• Characteristic violin-shaped marking is visible on back

From the CDC's Public Health Image Library (http://phil.cdc.gov), ID#1125, in the public domain.