part_of formation of assembly at emergence site IDOMAL:0002076 IDOMAL:0002076 In a few species, sexually mature males aggregate at the emergence sites, congregating on or near the water surface. Depending on species, they respond to pupae, to emerging females, to newly emerged females or to teneral females. In most of these species the male antennae are modified. Such males do not respond to the female wing-beat tone. In species in which respond to pupae, the male forelegs are modified. In all of these species, the males beome sexually competent only after inversion of their terminalia, which takes a period of hours, but females are sexually receptive at the time of emergence. Species that exhibit this kind of behaviour are, Opifex fuscus, Deinocerites cancer, Culiseta inornata, and the genuses Aedes and Psorophora. idomal_namespace formation of assembly swarming