Seq # 185120070

Caloptilia fidella (Reutti, 1853) Species

Last modified: May 26, 2021, 11:38 a.m.

First arrival in Belgium in 2009. Since then, it has spread mainly over the north and east of the country and it is now fairly common.


Family: Gracillariidae > Subfamily: Gracillariinae > Tribus: Gracillariini > Genus: Caloptilia > Species: Caloptilia fidella
Vernacular names
Hopsteltmot (NL), Hopfen-Blatttütenfalter (DE)
First mention in Belgium
Baugnée J.-Y. & De Prins W. 2010. Caloptilia fidella (Lepidoptera: Gracillariidae), a new leafminer to the Belgian fauna. — Phegea 38(2): 71–73. On page 71. view page




Ground colour of forewings dark greyish brown, a dirty white or yellowish dot in the middle of the costa, extending towards the apex.

Museum specimens

Specimens in nature


Greenish with very light brown head capsule.


A very small, triangular, blotch mine in a vein axil. Part of the frass is ejected, what remains lies scattered in the mine.
See also and


Pupation under a white, silken cocoon on the underside of a leaf.

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Freely living instars live under consecutively three leaf margins or leaf lobes that are rolled downwards.
The species hibernates in the adult stage.

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Flight periods

The adults fly in two generations a year: during June and from late August till May of the following year.

Observed on

Host plant (species):
Humulus lupulus

The larva feeds on Humulus lupulus and on the introduced Celtis australis.

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Gardens and hedge rows where Humulus lupulus grows.