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Dizygomyza (Icteromyza) calosoma Hendel, 1931. Fliegen palaearkt. Reg. 6(2): 53
Cerodontha (Poemyza) calosoma (Hendel, 1931); Nowakowski, 1967. Polskie Pismo ent. 37: 645
Cerodontha (Poemyza) calosoma (Hendel, 1931); Nowakowski, 1972. Polskie Pismo ent. 42(4): 741
Cerodontha (Poemyza) cingulata (Zetterstedt, 1948); Spencer, 1972. Handbk. ident. Br. Ins.: 102. [Misidentification, Spencer 1976: 186]
Cerodontha (Poemyza) calosoma (Hendel, 1931); Spencer, 1976. Fauna ent. Scand. 5(1): 185-6, fig. 326.

Leaf-miner: Details unknown.

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.

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).

Shining brown, deeply segmented; posterior spiracles separated, on short stalks, each with 3 bulbs, arising from a stout conical protuberance (Spencer, 1976).

Hosts in Great Britain and Ireland:

Poaceae
Elymus				Pitkin & Plant
Elymus	repens	Common Couch		Robbins, 1991: 136

Hosts elsewhere: Currently unknown.

Time of year - mines: Currently unknown.

Time of year - adults: June.

Distribution in Great Britain and Ireland: Argyll (Dunoon) (Spencer, 1972b: 102, as cingulata), Warwickshire (Allesley) (Robbins, 1991: 136) and Cambridgeshire (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Denmark, Sweden, Norway, Finland, N. Germany and Russia (Leningrad area) (Spencer, 1976: 186), Danish mainland, Finland, Germany, Norwegian mainland, Sweden and Nearctic region (Fauna Europaea)

Also recorded in Canada (Spencer, 1969a: 137).

NBN Atlas links to known host species:

British and Irish Parasitoids in Britain and elsewhere: