SeasonalityMost adults collected mid-June to mid-July, some late May in California (Townes & Townes 1978).
IdentificationFemale: Head and thorax black. Antennae brown, darker at base. Coxae black. Front and middle legs brownish, with tibiae and tarsi slightly lighter than femora. Hind legs with femur black, tibia mostly dark brown, tarsi paler. Gaster with first segment (waist) black basally and reddish-brown apically; second, third and fourth segments reddish-brown; remainder of gaster black.
Male: Similar to female, but with face (below antennae), mandibles, underside of coxae and underside of front and middle legs yellow. Gaster with apical half of first segment and all of segments 2-5 reddish-brown, remainder black.