Trachys troglodytes Gyllenhal, 1817

Trachys troglodytes mine

Succisa pratensis, Belgium, prov. Brabant Wallon, Rixensart, le Carpu: upperside of the leaf, with oviposition droplet; © Jean-Yves Baugnée

Trachys troglodytes: occupied mine on Succisa pratensis

Succisa pratensis, Belgium, prov. Namur, Agimont; © Jean-Yves Baugnée

Trachys troglodytes: occupied mine on Succisa pratensis

Succisa pratensis, Belgium, prov. Namur, Dourbes; © Stéphane Claerebout

mine

Full depth, transparant blotch. Oviposition site, at the leaf upper surface, covered by a brownish black drop of hardened secretion. Frass in granules or thread fragments. Pupa in the mine, not in a cocoon.

hostplants

Caprifoliaceae, oligophagous

Knautia arvensis, dipsacifolia; Scabiosa canescens, columbaria; Succisa pratensis.

Succisa seems the normal hostplant.

phenology

Larvae in June-July (Hering, 1957a).

BENELUX

BE observed (Bilý, 2002a; Fauna Europaea, 2007).

NE observed (Vorst, 2009a).

LUX observed (Fauna Europaea, 2007).

distribution within Europe

Almost all of Europe, Ireland excluded (Fauna Europaea, 2007).

larva

references

Allen (1969a), Bilý (1982a, 1993a), Brechtel & Kostenbader (2002a), Buhr (1933a, 1964a), Hering (1925b, 1930a, 1957a), Niehuis (2004a), Robbins (1991a), Schaefer (1949a), Sønderup (1949a), Théry (1942a), Vorst (2009a).

mod 24.viii.2018