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Pegomya
solennis (Meigen, 1826) Anthomyia
solennis Meigen, 1826. Syst. Beschr. 5: 187 |
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Leaf-miner: Linear mine, becoming a blotch. Two or more larvae feeding together. Frass in lines. At the start of the mine on the leaf under surface a group of about 5 oval white egg shells (just 1 on the small leaves of Rumex acetosella). The emerging larvae initally work shoulder to shoulder in making a broad corridor. Later they split up, making a large blotch, that often is enlarged even more by fusion with other mines. The mine is practically full depth. Frass blackish-green, often deliquescent. The larvae can leave a mine and restart elsewhere. Pupation outside the mine (Bladmineerders van Europa). The mine starts as a short corridor on the lower surface and then becomes a large upper surface blotch. Several larvae can mine together (British leafminers). Larva: The larvae of flies are leg-less maggots without a head capsule (see examples). They never have thoracic or abdominal legs. They do not have chewing mouthparts, although they do have a characteristic cephalo-pharyngeal skeleton (see examples), usually visible internally through the body wall. The larva is described by Vos-de Wilde (1935) and illustrated in Bladmineerders van Europa and British leafminers. Puparium: The puparia of flies are formed within the hardened last larval skin or puparium and as a result sheaths enclosing head appendages, wings and legs are not visible externally (see examples). The puparium is described by Stork (1936) and illustrated in (Bladmineerders van Europa) and British leafminers.
Comments: The mine, pupa and adult are illustrated in the the British Leafminers Newsletter. Records of Pegomyia versicolor on Heracleum (Robbins, 1991) and ? H. sphondylium (Ackland in Chandler, 1978: 228) are discounted by Griffiths (1982) as probable misidentifications of the tephritid Euleia heraclei. Ackland in Chandler (1978) did not indicate whether his host records were British or Foreign and are therefore included under 'Hosts in Britain' and 'Hosts elsewhere Hosts in Great Britain and Ireland:
Hosts elsewhere: Time of year - mines: June-July, September, November. Time of year - adults: Currently unknown. Distribution in Great Britain and Ireland: Widespread in Britain including Warwickshire (Barston and Sutton Park) (Robbins, 1991), Hampshire (Fleet) (British leafminers); Anglesey, Berkshire, Breconshire, Buckinghamshire, Caernarvonshire, Cambridgeshire, Cumberland, Dumfriesshire, East Kent, East Norfolk, East Suffolk, Glamorgan, Leicestershire, Merionethshire, Monmouthshire, North Hampshire, North Somerset, Nottinghamshire, Orkney, Oxfordshire, Pembrokeshire, Shropshire, South Devon, South Hampshire, South Lancashire, South Somerset, South-west Yorkashire, Surrey, West Kent, West Norfolk, West Suffolk and Worcestershire (NBN Atlas). Also recorded in the Republic of Ireland (Michelsen in Fauna Europaea). Distribution elsewhere: Widespread in continental Europe including The Netherlands, Luxembourg (Bladmineerders van Europa), Belgium (Gosseries and Ackland, 1991; de Meijere, 1939), Austria, Balearic Is., Crete, Czech Republic, Denmark, Finland, French mainland, Germany, Greek mainland, Hungary, Italian mainland, Latvia, Norwegian mainland, Poland, Russia - Central, North and Northwest, Sicily, Slovakia, Sweden, Switzerland and Ukraine (Michelsen in Fauna Europaea). NBN Atlas links to known host species: British and Irish Parasitoids in Britain and elsewhere:
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| Last updated 10-Jul-2019 Brian Pitkin |  |
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