1.) coupling
2.) The production in butterflies begins with courtship during which the Male vigorously flaps its wings, releasing a dust of microscopic scales carrying pheromones above the female’s antennae. these male pheromones act as a sexual stimulant to the female.
3.) When copulation takes place, the male butterfly or moth places a capsule of sperm (referred to as 'spermatophore') in a receptacle of the female (called the 'corpus bursae'). ... The females of some moths have a scent-emitting organ located at the tip of the abdomen.
