A common species of the western United States and Canada.
Males are notable for their dark markings, with reduced white scales on the carapace.
The rami of the embolus are more widely separated than in clemata, balia or chalceola. Females can be identified by carapace and abdominal markings, the epigynal topography and angled flaps. The epigynal surface rises more abruptly behind the flaps than in balia, but not so raised in a bulge as in insignis or clemata. Curtis reports one or two egg sacs per female with about fifty eggs that hatch on average in 25 days. Distribution Western United States, extending into Canada and Mexico.