Found running rapidly next to Roger Rittmaster's garage door. I was able to capture it, very carefully, in a jar, and brought it home for measurements and chilling. It had warmed up quite nicely when this photo was taken. The round bowl confused it, to some extent, and it would occasionally pause in its otherwise usual frenetic activity. Size measured by photographing adjacent to a scale.

According to the references in the guide page, D. occidentalis is the largest (up to 18 mm) Eastern Velvet Ant. The size and pattern are consistent with this species.