Color slate gray with darker head. Key to the Species 1. Callahan et al . The following description of reproductive behavior was taken largely from Leppla et al . Males orient into the wind 0.3 to 0.9 meters above ground level.
Females do nor hover but crawl up vegetation and take flight through the swarm of hovering males.
The female is grasped by a male during flight, or while she is on vegetation before flight. Individuals may feed alone, or while in copula, on nectar or pollen in the vicinity of the emergence site. There are few or no mating pair flights by afternoon. Eclosion from the pupal stage requires about 5.2 hours at 27 o C for males and six hours for the females. Both sexes become fully sclerotized within two hours.