Dry it is mainly a foam beetle. Floats better and I can see it.
Wet I usually use a #14 thread ant. I like the size 14 because that is the size of the carpenter ants where I fish. I have said many times, my summer wet fly combo on limestoners is a thread ant with a sunk trico spinner behind. The trico hatch may be short (but fun). However, they take sunk spinners after the spinner fall until about noon where I fish - gives a lot more time to fish.
Sometimes in late summer/early fall there are swarms of flying ants that get the trout going. Then it is a 20/22 winged ant dry. Generally, I don't like smaller ant patterns since I think the trout prefer carpenter ants. But there are times when a small floating ant is the ticket.
Small beetles? Sometimes the tiny jassid beetles work well. They like willows and for a change a tiny beetle under an overhanging willow tree works.