Apterae 1.8–2.7 mm, pale, wax-covered. Very similar to P. bumeliae, but with posterior wax gland plates on head weakly developed, sometimes absent. Diagnosis based on Heie (2004). Holocyclic and dioecious, alternating between Fraxinus excelsior ( Oleaceae) and roots of Abies, where wax-covered colonies are formed. Not ant-attended.
Pinaceae: Abies alba, balsamea, nordmanniana, sibirica, spp.
D N S.
Holman (2009) also lists Prociphilus (Stagona) xylostei from Abies roots. See under Picea (entry A17, p. 17).
B3 (B2) On aerial parts of the tree .................................................................................................B4 B4 (B7) Antennae at most 3-segmented. Scattered on bark or needles .........................................B5 B5 (B6) On needles .................................................................. Adelges (Aphrastasia) Börner, 1909