aedeagus: penis ( diagram "male terminalia") anal break: break in the vein along the posterior wing margin at the apex of the claval fold ( diagram "wing") antenna: usually 10-segmented apical spurs: strongly sclerotised spurs at the metatibial apex (tibia of hind leg) ( diagram "hind leg") capitate seta: seta which is apically inflated ( diagram "nymph") caudal plate: sclerotised terminal plate of the nymphal abdominal dorsum ( diagram "nymph") cell: surface between veins of wing ( diagram "wing") circumanal ring: ring consisting of densely spaced wax pores surrounding the nymphal anus ( diagram "nymph") dorso-ventral: in the vertical body axis dorsum: back metabasitarsus: basal segment of tarsus of hind leg ( diagram "hind leg") metatarsus: tarsus of hind leg ( diagram "hindleg") metatibia: tibia of hind leg ( diagram "hindleg") ovipositor: female terminalia consisting of proctiger, subgenital plate and valvulae ( diagram "female terminalia") paramere: paired structure attached to the male subgenital plate used during copulation to hold female terminalia ( diagram "male terminalia") proctiger: abdominal tergite containing anus ( diagram "male terminalia" and "female terminalia") sectaseta (plural sectasetae): short bipartite seta ( diagram "nymph") seta (plural setae): bristle, hair sternite: abdominal, ventral sclerite subgenital plate: genital sternite ( diagram "male terminalia" and "female terminalia") tergite: abdominal dorsal sclerite valvula (plural valvulae): part of the female ovipositor used to lay the egg ( diagram "female terminalia") venation: the forewing consists of a characteristic arrangement of the veins which separate the cells ( diagram "wing") venter: the ventral body surface wing buds: nymphal structures from which the adult wings develop ( diagram "nymph")