Female: three pairs of pointed tubercles on the abdomen, with the rear pair large and spreading to give the abdomen a triangular look. Tubercles are black-tipped and red at the base. The center of the dorsum is yellow. Male: abdomen does not have spines, widest at rear. (information from BugGuide)
The area where this spider was spotted was chock full of Micrathena sagittata.
Lat: 39.30, Long: -76.61
Spotted on Jul 26, 2012
Submitted on Aug 2, 2012