Pachypappa vesicalis Koch, 1856

Fig. 19B, G

Diagnosis

Diagnosis based on Carter & Danielsson (1991). Resembling P. populi . Antenna usually 5-segmented, PT extremely short. Cells in abdominal wax gland plates with a larger central spot (Fig. 19B). Spines at apices of tibiae very robust, much stronger than the hairs on first tarsal segment. Dorsal hairs on hind tibia with long, pointed apices. Dioecious. Alternates between white poplar Populus alba (Salicaceae) and Picea roots ( Pinaceae) where the aphids live in wax nests similar to those of Pachypapella lactea (Carter & Danielsson 1991) .

Distribution

F S.