Posted by John Carr on 13-12-2015 15:21
#2
I don't recognize them. The convergent wing veins suggest starting by looking at Asteiidae and
Xenasteia.
Posted by John Carr on 13-12-2015 15:44
#3
After reading the paper where
Xenasteia was described, I see these flies are similar to
X. okinawensis. In the original paper that species was distinguished by the yellow legs and base of abdomen contrasting with shining metallic thorax and remainder of abdomen. There is more recent work on the genus which I have not seen. Possibly many species have similar color.