Pachypappa tremulae (Linnaeus, 1761)

Fig. 19E

Diagnosis

Apterae 1–2 mm. Resembling P. populi . Cells in abdominal wax gland plates with a larger central spot (as in Fig. 19B). Segments 1 and 2 of all tarsi distinctly separated from each other. Spines at apices of tibiae very robust, much stronger than hairs on first tarsal segment. Dorsal hairs on hind tibia with fairly short and blunt apices. Life cycle as in the previous species. Anholocyclic hibernation on roots of spruce Picea is common.

Distribution

D F N S. See also Carter & Danielsson (1991).