Posted by Roger Thomason on 11-08-2009 17:38
#1
This little one has been flapping around for most of the day in my garden. The only species that fits the bill in my Checklist is
Geomyza balachowskyi,
Same coordinates as my other postings Jan Willem
Posted by Jan Willem on 11-08-2009 21:50
#4
Well this is a difficult one. In most cases (but not all) the females of
G. balachowskyi have a more banded colour pattern on the adbomen. On the other hand, the postnotum (part of the thorax below the scutellum) is in most cases (but not all) much darker in
G. hackmani. So the colouration of the abdomen would suggest
G. hackmani, but the colouration of the postnotum would suggest
G. balachowskyi. Studying sternite 8 (normally retracted and not readily visible) would give you the answer. So if you collected the specimen, you should study sternite 8.