Syrphidae literature

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We found 1 records. keyword "Helophilus hybridus" and ordered by year

Nielsen, T.R. (1969): Population studies on Helophilus hybridus Loew and Sericomyia silentis Harris (Dipt., Syrphidae) on Jæren, SW Norway - Norsk ent.Tidsskr. 16, 33-38