Posted by John Bratton on 01-02-2013 14:37
#1
I caught this in my garden, Menai Bridge, North Wales, 23 Jan. 2013. I'm hoping it is Heteromyza commixta. That is what it comes to using Collin (1943). But if H. atricornis has sneaked onto the British list via Roger Thomason's Shetland photos, I'm not clear how to separate these two.
Gorodkov (1988) said
male frons anteriorly tapered only slightly: H. atricornis
male frons anteriorly tapered gradually: H. rotundicornis & commixta
but I'm not sure what this difference would look like.
Can anyone help, please? The specimen is in alcohol so the colours are sharper than in life.
John Bratton
Posted by John Bratton on 01-02-2013 14:38
#2
Four pairs of dorso-centrals, one pair in front of the suture. You'll have to take my word for it.
Posted by John Bratton on 20-03-2013 13:00
#5
I'm bringing this back to the top in the hope someone can identify it please.
John