mining initially on lower surface of leaf, later filling the tip
of the leaf on the upper surface with a linear blotch mine (Spencer, 1972b: 77).
mine starts with a lower-surface, relatively wide corridor. After
its first moult the larva continues upper-surface, its mine in the
end entirely occupying several leaf segmets (Allen, 1956a; Hering,
1957). Frass in rather coarse granules. Pupation outside the mine,
exit slit in upper epidermis (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 are described Allen (1957b).
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).
Black; posterior spiracles each with 20 bulbs (Spencer, 1972b: 77).
Comments: Treated as a junior name of Phytomyza adjucta (recorded on Pimpinella and ? Silaum in the NBN
Hosts in Great Britain & Ireland:
of year - mines: July, September-October.
of year - adults: Currently unknown.
in Great Britain & Ireland: Surrey (Egham), Cambridge (Chippenham
Fen) (Spencer, 1972b: 77)
and Warwickshire (Combrook and Ufton Fields) (Robbins,
NBN Grid Map:
map of silai, treated as a junior name of adjuncta
elsewhere: Europe (Spencer,
1990) including Germany (Bladmineerders van Europa) and Poland (Martinez in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: