I tie a very similar pattern to that beetle. I actually wind some peacock herl around the twisted section of the foam. I need to make some hi vis like that one too. I've got great eye sight, but that black foam on the water is hard to see.
For my ant pattern it's very simple. Wind the hook with black thread, cut a small section of foam, tension is key to keep the foam on top of the hook, tie foam onto hook in 3 sections, i've even seen it in just 2. And add optional hackle behind the first section. Real easy.
I had a guy give me one last year. He said he uses them just about every time he fishes. His fishing buddies call him "ants". I've had a good amount of success with them too. I heard rumor that stocked trout like them because the ants get into the pellet food and they're used to eating them. Just a rumor though. I like terrestrials though. Around just about the whole year and they catch fish.