Thread subject: Diptera.info :: metallic blue flies on Hogweed

Posted by cebe on 17-08-2014 17:55
#1
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
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Posted by ValerioW on 17-08-2014 18:07
#2
Lonchaea sp. (Lonchaeidae)

Posted by Paul Beuk on 19-08-2014 21:41
#3
Massing of specimens reminds me of Silba fumosa

Posted by Iain MacGowan on 28-08-2014 14:48
#4
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/