Posted by Isidro on 17-08-2019 19:32
#1
Boston, Massachusetts.
24th July 2019.
On a wooden fence that divides a forest from a park.
Any help with ID appreciated! Thanks!
Posted by Isidro on 18-08-2019 06:11
#3
Thanks, not possible to distinguish between both genus?
Posted by John Carr on 18-08-2019 18:23
#4
If there are bristles on the hind basistarsis and vein M is bent abruptly in the middle of the last section as seen from above,
Dolichopus. If the hind basitarsus is bare and vein M is nearly straight in the middle,
Gymnopternus. What I can see of the color, bronze stripe on thorax and pale lower postocular hairs, is more typical of
Dolichopus. Also,
Gymnopternus usually has a row of short bristles on the fore tibia where long bristles are visible.
Posted by Isidro on 18-08-2019 21:00
#5
s Joh, I fear that the hind tarsi are not enough in focus for distinguish the bristles. If generic identification is nearly impossible I suppose that specific ID will be much so.