Figure 3. Wing bud length versus head width of neotenics obtained from orphaning experiments and nymphs from field colonies. Neo: neotenics; N1: 1st nymph instar; N2: 2nd nymph instar; N3: 3rd nymph instar; N4: 4th nymph instar; N5: 5th nymph instar; N6: 6th nymph instar.