The phallus originates on the ventral side of the abdomen between the epandrium and hypandrium. It usually is long and slender (except in species of the daciformis and dentata groups), and at rest the apical part is coiled and placed between tergite 5 and the rest of the male terminalia. It must be extended to measure its length, by gently holding and pulling both ends.. Measure the mesonotum in dorsal view along its midline, from the anterior margin of the scutum to the apex of the scutellum.