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

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Agromyza graminicola Hendel, 1931
[Diptera: Agromyzidae]

Agromyza graminicola Hendel, 1931. Fliegen palaearkt. Reg. 6(2): 122
Agromyza graminicola Hendel, 1931; Spencer, 1976. Fauna ent. Scand. 5(1): 112, figs 180-1.
Agromyza graminicola Hendel, 1931; Spencer, 1990. Host specialization in the world Agromyzidae (Diptera) : 356, 358 (figs 1339-40), 359.


Leaf-mine: A linear mine with two rows of frass (Spencer, 1976: 112, fig. 181).

Eggs are deposited singly, near the leaf margin, at some distance from the leaf tip. From this point an upper-surface corridor-blotch develops. Initially a narrow corridor ascends towards the tip; after some time the direction switches and the mine, now widening quickly, descends towards the leaf base. Frass in two rows. Puparium within the mine (Bladmineerders van Europa).

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 Griffiths (1963).

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).

Reddish-brown. Posterior spiracles, each with 3 bulbs, separated by about 3 times their diameter (Spencer, 1976: 112).

Hosts in Great Britain & Ireland: Currently unknown.

Hosts elsewhere:

Poaceae        
Arundo donax     Bladmineerders van Europa
Phragmites       Spencer, 1990: 356
Phragmites australis Common Reed British Wild Flowers by John Somerville et al. Spencer, 1976: 113
Phragmites australis Common Reed British Wild Flowers by John Somerville et al. Bladmineerders van Europa

Time of year - larvae: June and August (Bladmineerders van Europa).

Time of year - adults: Currently unknown.

Distribution in Great Britain & Ireland: Added to British checklist by Cole in Chandler (1998: 136).

NBN Grid Map:

NBN Grid Map

Agromyza graminicola
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Distribution elsewhere: Widespread in continental Europe including The Netherlands (Bladmineerders van Europa), Belgium (Scheirs, de Bruyn and von Tschirnhaus, 1995), Germany (Spencer, 1976: 546), Austria, Denmark, Estonia, Finland, Hungary, Lithuania, Poland, Spanish mainland and Sweden (Martinez in Fauna Europaea).

NBN Interactive Grid Maps of known host species:

Phragmites australis

British and Irish Parasitoids in Britain and elsewhere:

Chalcidoidea  
Merismus megapterus Walker, 1833 Pteromalidae: Miscogastrinae
Ichneumonoidea  
Rhogadopsis reconditor Wesmael, 1835 Braconidae: Opiinae


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