Dolerus stygius - Woolly Lamenter

Benson (1952) considered the species mostly confined to Speyside and Deeside, but it has subsequently been recorded widely across mainland Britain, albeit records are sparse in the southernmost counties (Musgrove, 2023).

A black species. In the female, the top of the head, mesonotum and mesopleura have dense woolly pubescence that is longer than the width of the apex of the fore basitarsus. In both sexes, the front margin of the clypeus is sharply incurved and emarginated to a depth of much less than half the length of the clypeus. The mesoscutellum lacks a carina and is highly polished without punctures or striations. In the male, the penis valve has a large ventral tooth that terminates in a small hook.

Larvae feed on sedges.

Jump to other Dolerus species

Size: 9.5-10.5mm

IUCN Status: Least Concern
GB Rarity Status: None

Distribution: England, Scotland, Wales

Flight period: May to June

Plant associations: Cyperaceae (sedges)


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

Heidemaa, M. and Viitasaari, M., 2004. Taxonomy of the Dolerus gibbosus species group with descriptions of Dolerus zhelochovtsevi sp. nov., the males of D. blanki Liston, 1995 and D. quadrinotatus Biro, 1884, and redescription of the D. gibbosus Hartig, 1837 male (Hymenoptera: Tenthredinidae). Zootaxa.

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

Musgrove, A.J. 2023. A review of the status of sawflies of Great Britain - Phase 2: The Athaliidae and the Tenthredinidae (excluding Nematinae). Natural England, unpublished