Can You Help Identify This Insect?

I took this photo on some blackberries here in Poplarville, MS.  So far we (myself and two entomologists) have not been able to positively ID it.  The entomologists have come close, identifying the family and even sub-family, but the exact species is still elusive.  Any thoughts out there?

Can you ID this insect?

Can you help ID this insect?