Adelges (Adelges) laricis Vallot, 1836

Figs 58–61

Diagnosis

Neosistens: About 0.3 mm, brownish black, without wax secretion. Dorsal plates of head and thorax fused. Dorsum heavily sclerotised and somewhat wrinkled. Adult aptera oval or sub-circular, blackish or dark grey, about 1 mm., usually with wax wool. Alata 1.0– 1.5 mm, head with anterior and posterior wax gland areas, if present, usually separate. Al. gallicola (migrating from Picea) with poorly developed wax secretion. Holocyclic and dioecious, alternating between Picea (p. 9) and Larix . On Larix overwintering at bud bases or in bark crevices on twigs and branches. In spring and summer on needles. Not antattended.

Recorded secondary hosts

Pinaceae: Larix decidua *, decidua x kaempferi, gmelinii, kaempferi *, laricina *, lyallii *, sibirica *, spp.

Distribution

D F N S.