I have something new this year. Central Florida. I think the insect is 'sanddragon', although info says they hover above water. There were HUNDREDS yesterday- flying in figure eight pattern about 4-8' abouve and area of yard that is sandy. I saw several holes in the dirt area about pencil size thickness. Black with either 4-5 white stripes going across the tail(maybe yellow??). Today there were about 50. They are in a group about 10'x10'. That was about an hour ago-5pm. Now nothing. Anyone know about these? Thanks. Edie