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i»~.-». » a Fig. 249 Larva of a small narcissus fly, Eumerus strigatus (x7).

and other suitable underground parts of host plants. Fully fed larvae usually pupate in the neck region of infested bulbs, and adults of a second generation appear in mid-summer. Larvae of the second generation become fully grown by the autumn. They then enter the surrounding soil where they overwinter; pupation occurs in the spring. DESCRIPTION

Adult 5-6 mm long, mainly black with a golden sheen on the head and thorax; thorax with whitish longitudinal lines; abdomen with three pairs of white, crescent-shaped marks; pterostigma of forewing yellow or light brown. Egg 0.7 mm long, elongate, white. Larva up to 9 mm long; dirty yellowish-white; posterior respiratory cone reddish-brown and elongated (Fig. 249). Puparium 6-7 mm long, dirty yellowish-white; posterior respiratory cone reddish-brown and elongated (Fig. 250).

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