Thread subject: Diptera.info :: Wich fly?
Posted by amaira on 16-08-2006 13:27
#1
This fly has been rather common here in my garden this summer.
She is about 10 mm and I don?t know her name.
Posted by Susan R Walter on 16-08-2006 13:32
#2
According to Theo - closed top cell and reddish sides to the abdomen -
Eriothrix rufomaculata - another example of the self learning forum I hope Theo:p
Posted by Paul Beuk on 16-08-2006 13:35
#3
I'd rather expect it to be a species of
Cylindromyia...
Posted by Dmitry Gavryushin on 16-08-2006 13:38
#4
[Well it looks more like a
Cylindromyia sp. to me...]
I was a bit late with this, though.
Edited by Dmitry Gavryushin on 16-08-2006 13:39
Posted by Susan R Walter on 16-08-2006 13:40
#5
I did think it looked pretty skinny
Posted by Tony Irwin on 16-08-2006 16:13
#6
It's not
Eriothrix, so I think the "closed top cell and red sides to the abdomen" only applies to
Eriothrix-shaped tachinds.
Edited by Tony Irwin on 16-08-2006 16:25
Posted by Kahis on 16-08-2006 16:29
#7
Cylindromyia interrupta. Given your location other similar species are unlikely.
C. pusilla and
C. brassicaria are also common in middle Scandinavia, but other species are very rare (in fact the only have those three species in Finland).
Posted by Zeegers on 16-08-2006 17:24
#8
First of all, my apologies to Susan.
She is right, it fits my description.
It's difficult te characterize any of the 400 Tachinids in one sentence.
The topcel is not closed, but stalked, meaning the stalk is clearly present. I agree that the difference is gradual, however, this wing venation doen not fit Eriothix.
Moreover, the abdomen is more cylindrical (!) and the reddish lateral spots are larger (and therefore less lateral).
SO Cylindromyia.
I'm not sure about the species.
It is either C. interrupta or auriceps.
I seem to see small scutellar apical bristle, maybe this can be checked on the original photo (?). They are small, no problem.
In that case, it would be auriceps, which is absent in Finland (Kahis) but present in Sweden (www.faunaeur.org).
On the other hand, the pattern on the thorax suggests interrupta (in which case apical scutellars should be absolutely absent). However, difficult to see the thoracic pattern on the picture.
So, one of those
Theo Zeegers
Posted by Kahis on 16-08-2006 18:21
#9
Hi!
I have a copy Christer Bergstr?m's master list of provincial records for Swedish Tachinidae (very much unofficial, sorry). It lists ?sterg?tland as the northernmost place where
C. auriceps is found.
Posted by Zeegers on 16-08-2006 19:12
#10
Great.
My geographical knowledge of Fennoscandia is insufficient to grasp the consequence.
So, my turn to ask a simple question
is Stockholm north or south of Ostergotland ?
Theo
Posted by Kahis on 16-08-2006 19:20
#11
North, by some 200 km.
Posted by Zeegers on 16-08-2006 20:30
#12
So I saw the thorax right and there are no apical scutellars.
I'm quite satisfied.
Thanks
Theo
Posted by amaira on 16-08-2006 22:21
#13
Cylindromyia interrupta. You are fantastic! :D Thanks.