The leaf and stem mines of British flies and other insects

(Coleoptera, Diptera, Hymenoptera and Lepidoptera)

by Brian Pitkin, Willem Ellis, Colin Plant and Rob Edmunds


CALYSTEGIA. Bindweeds. [Convolvulaceae]

Three species and numerous subspecies of Calystegia are recorded in Britain.

Two British miners are recorded on Calystegia.

A key to the European miners recorded on Convolvulus including Calystegia is provided in Bladmineerders van Europa.

Large Bindweed - Calystegia silvatica. Image: © Brian Pitkin
Large Bindweed
Calystegia silvatica

Key for the identification of the known mines of British
insects (Diptera and non-Diptera) recorded on Calystegia

1a > Leaf-miner: At first it makes a narrow gallery lined with frass, but subsequently it makes a series of large translucent yellowish brown blotch mines from which all frass is ejected. It also constructs under the leaf an 'aerial' network of silk threads in which it moves around and rests clear of the leaf surface when not feeding. The pupa is attached to a leaf without a cocoon. It has a dorsal keel and a pronounced facial beak.

On Calystegia, Convolvulus and Ipomoea in Britain and elsewhere. Widespread in southern England and Wales. Also recorded in the Republic of Ireland. Widespread in continental Europe.

Bedellia somnulentella (Zeller, 1847) [Lepidoptera: Bedelliidae].

1b > Leaf-miner: In the first instar the larva mines the leaves, forming short, irregular, blotch-like mines, but in later instars it lives externally, feeding in spun leaves and often twisting those of tender shoots. Larval head light-brown or yellowish brown, edged with black postero-laterally, ocellar area blackish; prothoracic plate black edged with whitish anteriorly; abdomen dull dark green; pinacula distinct, black, sometimes brownish but with black bases to setae; anal plate large, black (Bradley et al., 1973). Small, full depth mine without a definite shape; little frass. Some silk is deposited in the mine. The larva soon leaves the mine and continues feeding among spun leaves.

Polyphagous. On numerous genera and species of plant families, but not yet on Calystegia, in Britain. On numerous genera and species of plant families including Calystegia elsewhere. Widespread in Britain and continental Europe. Also recorded from the Channel Is.

Cnephasia incertana (Treitschke, 1835) [Lepidoptera: Tortricidae].

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