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Brachypalpus laphriformis female
#1 Print Post
Posted on 20-09-2021 16:49

Posts: 70
Joined: 02.02.12

Please, help me with the identification of this hoverfly. It was collected on the sunlit trunk of Betula in the evening. When disturbed, it started to fly around the trunk imitating the flight partten of a solitary bee.

Specimen data: May, 30, 2021, Russia, Moscow, edge of a mixed forest.

Body length: 11mm. Wingspan: 20mm.
Edited by Nikolay_D on 21-09-2021 08:00
#2 Print Post
Posted on 20-09-2021 16:53

Posts: 70
Joined: 02.02.12

Photo№2 (same specimen)

Photo№3 (same specimen)

Photo№4 (same specimen)

Photo№5 (same specimen)
Jan Maca
#3 Print Post
Posted on 20-09-2021 20:53

Posts: 676
Joined: 25.03.10

A Merodon sp.
#4 Print Post
Posted on 20-09-2021 21:12

Posts: 70
Joined: 02.02.12

Thank you for the help.
Is it possible to determine it down to the species level?
#5 Print Post
Posted on 20-09-2021 23:27
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Location: Berlin, Germany
Posts: 3646
Joined: 28.07.07

I disagree with Merodon. In that genus, wing vein R4+5 has a distinct loop. To me, it's a female of Brachypalpus laphriformis (compare https://www.flick...240971524/).
Regards, Sundew
Jan Maca
#6 Print Post
Posted on 21-09-2021 07:25

Posts: 676
Joined: 25.03.10

Sorry fot mistake.
#7 Print Post
Posted on 21-09-2021 08:07

Posts: 70
Joined: 02.02.12

Thanks for the correction of determination!
I looked through the flickr page on Brachypalpus laphriformis. The behavior of this fly imitating Osmia exactly matches what I have witnessed. Frankly speaking, when it was disturbed and started to fly around the trunk, I thought that the fly flew away and a bee just came to investigate. It was only when it settled for the second time that I realized the trick.
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17 October 2021 05:09


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23.09.21 15:29
All sorted.

16.09.21 22:24
Sorry put 5 new threads in Asilidae forum instead in Syrphidae forum, can pleas an admin move it to Syrph? THANKS, Norbert

09.09.21 07:48

09.09.21 07:47
wing ventation is totally different

03.09.21 12:51
Hi, what's the major difference between dolichopodidae and rhagionidae? Can someone help me? Thanks!

28.06.21 15:24
thx TO eklans

03.06.21 11:11
@Tony Irwin Thank you Tony! I've emailed you there Pfft

02.06.21 22:26
Rob - can you PM me with an e-mail address, and I'll send it over.

02.06.21 13:16
Hello chaps! Does anyone have a copy of: Revision of the willow catkin flies, genus Egle Robineau-Desvoidy (Diptera: Anthomyiidae), in Europe and neighbouring areas ?? I'd be ever so grateful! Rob

31.05.21 14:31
The part that got deleted is "longer, dark median stripe on thorax"

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