Caliroa tremulae

First found in Norfolk in 1993. The third antennal segment clearly shorter than the fourth and fifth combined. Hind tibia with white basally (one-third). In the male, the hind tarsus entirely black on basal segment. External face of middle tibia white.

Caliroa tremulae larvae are mucus covered " slugworms" that feed on the underside of aspen leaves. They pupate in the ground.

Jump to other Caliroa species

Size: 4 - 6mm

Status: Rare

Distribution: England

Flight period: June to August

Plant associations: Populus tremula (aspen)


Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London

Liston A, Knight G, Sheppard D, Broad G, Livermore L (2014) Checklist of British and Irish Hymenoptera - Sawflies, ‘Symphyta’. Biodiversity Data Journal 2: e1168.