Biennial life cycle of Adelges nordmannianae (Eckstein, 1890) (Aphidinea), from Pesson, 1951, with changes. Stages 1–13 occur during first year on Picea orientalis (Linnaeus, 1763): 1 female “sexupara”, migrated from fir (June) 2–3 larval instars on spruce (July) 4–5 female and male (July) 6 oviposition (July) 7 wintering larva (August-March) 7bis–8 female “fundatrix” (April) 9 oviposition (April) 10–11 larva, producing a gall on twig of spruce (Mai) 12 nymph (June) 13 migrating female (July). Stages 14–24 occur during second year on Abies nordmanniana (Steven, 1838): 14–15 females, migrating from spruce lay eggs (July) 16 overwintering larva (August-April) 17–18 parthenogenetic female and its oviposition (Mai) 19–23 new parthenogenetic generations (Mai-June) 24 alate female, migrating to spruce (June).