cover image: The flower flies of the subfamily Syrphinae of Canada, Alaska and Greenland

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The flower flies of the subfamily Syrphinae of Canada, Alaska and Greenland

6 Mar 2010

Larvae of Syrphinae and of the tribe Pipizini (of doubtful position but here referred to the Eristalinae) are probably all predators of Homoptera (particularly aphids) and of a few other groups of insects. [...] In males of all Nearctic Syrphinae the eyes meet on the frons or are separated by at most the width of two ommatidia, and the apex of the abdomen is asymmetrical with the genital capsule usually conspicuous in ventral view. [...] In females the eyes are widely separated on the frons and the apex of the abdomen is symmetricaL Du"sek and L6ska (I974b), after observing that early spring adult specimens of some species were much darker than summer specimens, showed that temperature during pupation in two species of Eupeodes (as Metasyrphus), in one of Episyrphus Matsumura, and in one of Sphaerophoria had a very marked effect o [...] Second, larvae of most or all species of Syrphinae and of species of the tribe Pipizini (Eristalinae or Syrphinae) are predators of various groups of Homoptera (particularly Aphidoidea), of eggs and larvae of Chrysomelidae, and, outside Canada, ofThysanoptera nymphs and oflarvae ofTortricidae. [...] Some species of Eumerus Meigen and Merodon Meigen in bulbs of ornamental Liliaceae or of onions and one or more species of Cheilosia Meigen in burrows of Scolytidae in timber cause disfiguration of the wood known as black check.
agriculture biology botany insects organisms aphid bees pollinator anatomical terms of location insect wing insect morphology femora frons pupa abdomen aphis pupate puparium black bean aphid flower flies hoverfly predacious mimicry syrphids
Pages
460
Published in
Ottawa

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