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Diptera.info :: Identification queries :: Diptera (adults)
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metallic blue flies on Hogweed
cebe
#1 Print Post
Posted on 17-08-2014 17:55
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Yesterday I saw in Brussels those small metallic blue flies with a special interest in the stem below the umbel of hogweed. What could it be and do they feed on mildew?
Thanks
Bart
bru.waarnemingen.be/fotonew/4/7232964.jpg
bru.waarnemingen.be/fotonew/1/7232951.jpg
bru.waarnemingen.be/fotonew/8/7232958.jpg
bru.waarnemingen.be/fotonew/2/7232962.jpg
 
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ValerioW
#2 Print Post
Posted on 17-08-2014 18:07
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Lonchaea sp. (Lonchaeidae)
 
Paul Beuk
#3 Print Post
Posted on 19-08-2014 21:41
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Massing of specimens reminds me of Silba fumosa
Paul

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Iain MacGowan
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Posted on 28-08-2014 14:48
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Hi Bart

yes I agree with Paul they could be Silba fumosa - this species is well known as breeding in decaying hogweed roots and stems so they could well have just emerged - but given most are females and look a bit gravid they could be congregating at a particullarly good oviposition site
Iain http://lonchaeidae.myspecies.info/
Iain MacGowan
 
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