Abstract
AbstractThe discovery of the European dandelion leaf-gall midge, Cystiphora taraxaci (Kieffer, 1888) (Diptera: Cecidomyiidae), in north-central Saskatchewan, Canada, on dandelion, Taraxacum officinale Weber (Asteraceae), is reported. This is the first record of this insect in North America. Cystiphora taraxaci is similar to Cystiphora canadensis Felt which produces galls on rattlesnake-root, Prenanthes spp., and is known only from females. Separation of the two species was achieved by demonstrating that C. taraxaci produced galls on dandelion but not on Prenanthes spp. The identity of C. taraxaci was confirmed by comparison of specimens collected in Saskatchewan with those in Europe. In Saskatchewan, C. taraxaci occurs over at least 12 000 km2 and is parasitized by Aprostocetus sp. near atticus Graham and Crysonotomyia spp. (Hymenoptera: Eulophidae).
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