Waps have muscles that beat the wings, and muscles that move the legs. Without muscles they coudn't be able to fly, move an antenna and many other things.
Wasps muscular system is essential to its life. Like spiders they have muscles to bend their hind legs and be able to move around. Interesting in this is that the muscle maxilla is also found on humans near the jaw. As you can see not musch muscle can really grow on a wasp.