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Diptera.info :: Identification queries :: Diptera (adults)
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Cecidomyiidae bright yellow! (subfamily Lestremiinae?)
blowave
#1 Print Post
Posted on 15-03-2011 20:31
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Location: LINCOLN, UK
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 Hi!

This was inside on 5th September 2010, near Lincoln UK.

Size ~3mm. I wondered if anyone had a clue of what it is due to the colour!

1 pic + 1 crop

Janet Smile
blowave attached the following image:


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Edited by blowave on 16-03-2011 21:19
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blowave
#2 Print Post
Posted on 15-03-2011 20:32
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 crop
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Sara21392
#3 Print Post
Posted on 15-03-2011 20:34
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 Wow! Very nice! Grin
Sincerely yours
Sara
 
blowave
#4 Print Post
Posted on 16-03-2011 21:17
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 Yes Sara, it is exceptionally nice! Grin

I have been searching on Bug-guide, John Carr has mentioned that:

Gall midges with five tarsal segments, first longer than second are Lestremiinae.


I think the first tarsal segment is longer than the second, and it has 5 segments!
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Sara21392
#5 Print Post
Posted on 16-03-2011 22:38
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 Janet! I can't see 4th and 5th segments tarsi? (Could you please show me?) Frown Are they last segments?
Sincerely yours
Sara
 
blowave
#6 Print Post
Posted on 16-03-2011 22:55
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Sara21392 wrote:
Janet! I can't see 4th and 5th segments tarsi? (Could you please show me?) Frown Are they last segments?


A big HMMMMM! I'm not sure I can see them now! I thought I saw a joint where I have put a funny ? next to the line, but its not obvious and I can't see it on the first tarsus. Frown I lightened it a little to see better..
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Sara21392
#7 Print Post
Posted on 16-03-2011 23:31
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 Well, I think I can see it on first leg (blue line!!) but I couldn't see it on second leg! Cool What do you think?? Smile
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Edited by Sara21392 on 16-03-2011 23:35
Sincerely yours
Sara
 
Stephen R
#8 Print Post
Posted on 16-03-2011 23:35
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 My old eyes can only see 4 segments on both.
 
Sara21392
#9 Print Post
Posted on 16-03-2011 23:42
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 Stephen! maybe I'm wrong!!! I'm not sure, and picture is not clearly!?
I think better again see under microscope...! Smile
Sincerely yours
Sara
 
blowave
#10 Print Post
Posted on 17-03-2011 01:11
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 I think I can see it on the first leg Sara! I have edited the pic a little to brighten it, and sharpened more. Where I have put the two black lines I think there is a dark line which looks like a joint, but there also looks to be a small notch just below where I have put the thin black line. awkward

The original looks a little better than the uploaded pic, I think!
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John Carr
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Posted on 17-03-2011 02:00
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 The "?" does not point to a segment division. The division between first and second segment is very faint. It is about twice the diameter of the tarsus from its base.
 
http://www.flickr.com/photos/31715949@N00
blowave
#12 Print Post
Posted on 17-03-2011 02:23
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John Carr wrote:
The "?" does not point to a segment division. The division between first and second segment is very faint. It is about twice the diameter of the tarsus from its base.


If I got that right John, I have put a tick next to the black line where I think the division is.. so this does mean there are 5 segments?
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John Carr
#13 Print Post
Posted on 17-03-2011 02:34
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 That's about where I see the division. The segments are fused together and the exact location of the joint may not be clear.
 
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blowave
#14 Print Post
Posted on 17-03-2011 03:32
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 So we are looking at a gall midge with a very short 1st and comparitively long 2nd tarsal segment.

I'm relying on your knowledge John! Does this indicate a subfamily?
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Paul Beuk
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Posted on 17-03-2011 08:06
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 I think it only excludes Lestremiinae.
Paul

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Sara21392
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Posted on 17-03-2011 08:30
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 It means, first seg. longer than second?? Yes?Smile
Sincerely yours
Sara
 
Paul Beuk
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Posted on 17-03-2011 09:48
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 In Lestremiinae the first segment is not extremely shortened, in other cecidomyiids the second is much longer than the first.
Paul

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Sara21392
#18 Print Post
Posted on 17-03-2011 10:05
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 Thanks Paul! Grin
Sincerely yours
Sara
 
Gunnar M Kvifte
#19 Print Post
Posted on 17-03-2011 10:23
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 Lestremiinae also has ocelli present, which your specimen does not seem to have.
 
blowave
#20 Print Post
Posted on 19-03-2011 14:59
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 Thank you all for the extra information!

I have checked the wing venation on drawwing, there are subfamilies given. The one which mine looks to match suggests subfamily Cecidomyiidae within the family Cecidomyiidae. Is there such a subfamily? It's not listed for here!

http://www.drawwi...idomyiidae

We only have three subfamilies listed..

http://www.dipter...hp?id=2731

I altered the pic of the wings so the venation can be seen better..
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