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


Cerodontha imbuta (Meigen, 1838)
[Diptera: Agromyzidae]

Agromyza imbuta Meigen, 1838. Syst. Beschr. 7: 400
Phytobia deschampsiae Spencer, 1957b. Entomologist's Gaz. 8: 94. [Synonymised by Spencer and Martinez, 1987]
Cerodontha (Poemyza) deschampsiae (Spencer, 1957b); Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 104
Cerodontha (Poemyza) imbuta (Meigen, 1838); Spencer, 1990. Host specialization in the world Agromyzidae (Diptera) : 354, 367, 368 (fig. 1378).

Leaf-miner: Details unknown (Bladmineerders van Europa). Pupation internal (Spencer, 1972b: 104, as deschampsiae).

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 Nowakowski (1973, as deschampsiae).

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 Nowakowski (1973, as deschampsiae). Brown, with distinctive posterior spiracles (Spencer, 1972b: 103 (fig. 352), 104, as deschampsiae).

Puparium slender, light brown; rear spiracula strikingly elongated, on a broad base; also the (3?) bulbs elongated; anus on a characteristic tumescence (Bladmineerders van Europa).

Hosts in Great Britain and Ireland:

Deschampsia cespitosa Tufted Hair-grass British Wild Flowers by John Somerville et al. Mines in BMNH
Deschampsia cespitosa Tufted Hair-grass British Wild Flowers by John Somerville et al. Spencer, 1972b: 123

Hosts elsewhere:


? Calamagrostis

canescens ? Purple Small-reed   Bladmineerders van Europa
Deschampsia       Spencer, 1990: 354
Deschampsia cespitosa Tufted Hair-grass British Wild Flowers by John Somerville et al. Bladmineerders van Europa

Time of year - mines: August.

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: Uncommon. Middlesex (Scratch Wood) and Cambridgeshire (Chippenham Fen) (Spencer, 1972b: 104, as deschampsiae); Denbighshire and South-west Yorkshire (NBN Atlas).

Also recorded in the Republic of Ireland (Fauna Europaea).

Distribution elsewhere: Widespread in continental Europe including Germany (von Tschirnhaus, 1999), Czech Republic, Denmark, Estonia, Finland, French mainland, Lithuania, Poland, Slovakia, Spanish mainland and Switzerland (Fauna Europaea).

NBN Atlas links to known host species:

Calamagrostis canescens, Deschampsia cespitosa

British and Irish Parasitoids in Britain and elsewhere:

Ichneumonoidea - Links to species no longer available  
Chorebus difficilis Griffiths, 1968 Braconidae: Alysiinae
Chorebus enephes (Nixon, 1845) Braconidae: Alysiinae
Chorebus poemyzae Griffiths, 1968 Braconidae: Alysiinae
Apodesmia posticatae (Fischer, 1957) Braconidae: Opiinae
Phaedrotoma variegata (Sz├ępligeti, 1896) Braconidae: Opiinae

External links: Search the internet:
Biodiversity Heritage Library
Bladmineerders van Europa
British leafminers
Encyclopedia of Life
Fauna Europaea
NBN Atlas
NHM UK Checklist
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