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


Napomyza lateralis (Fallén, 1823)
[Diptera: Agromyzidae]

Calendula fly

Phytomyza lateralis Fallén, 1823b. Phytomyzides et Ochtidiae Sveciae : 3. Napomyza lateralis (Fallén, 1823b); Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 68
Napomyza lateralis (Fallén, 1823b); Spencer, 1976. Fauna ent. Scand. 5(1): 338-40, figs 616-9.
Napomyza lateralis (Fallén, 1823b); Spencer, 1990. Host specialization in the World Agromyzidae (Diptera) : 58, 150, 155, 207, 231, 251, 253, 259, 265, 274, 281, 290-1, 293, 295, 301, 302 (fig. 1167) and more.

Stem-feeder : Larvae normally feed in stems but have been found in the inflorescence (Spencer, 1972b: 68).

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 Dempewolf (2001: 179).

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).

Yellowish, elongate; posterior spiracles each with some 10 bulbs (without central horn).

Comments: Spencer (1990) accepts a Napomyza species on Linum as representing lateralis. However, more detailed studies may show that this population represents a distinct species.

Hosts in Great Britain and Ireland:

Anthemis       Spencer, 1972b: 111
Bidens       Spencer, 1972b: 112
Calendula       Spencer, 1972b: 112
Dimorphotheca       Spencer, 1972b: 113
Senecio vulgaris Groundsel British Wild Flowers by John Somerville et al. Spencer, 1972b: 114
Tripleurospermum maritimum x inodora     Spencer, 1972b: 113, as Matricaria

Hosts elsewhere:

Anthemis       Spencer, 1976: 340
Bellis       Spencer, 1990: 274
Bidens       Spencer, 1976: 340
Calendula       Spencer, 1976: 340
Carduus       Spencer, 1976: 340
Centaurea       Spencer, 1976: 340