Another really cool image Alfred! The sharpness of the fly and the assassin bug's front end is great, as are the colours exposure and comp. I'm not familiar with these (just looks like a colourful mosquito from the north ;-)...but if they don't move to fast when they have prey, have you tried to get another shot with the rear legs and abdomen in focus and then do a composite? I've tried a few with perched dragonflies with some success even in front on views like this one.
Another very cool behavior/action image, Alfred. These orange assassins do make great photo subjects. Very sharp up front where it most needs to be. Are you using a tripod for these or are you hand holding and letting the flash stop the motion?
1600!!!, nice and sharp and no noise!!! Have been following you assassin series and they are all great Al. Got the sharpness on the fly and the legs of the bug. Really good:)
I saw tons of Assasin bugs at the arboretum in KC today. I may have gotten an image or two but haven't downloaded the photos yet. I know now what you mean about them hiding! They are underneath flowers and back in crevices...they really hide out!