These lessons were left for a general substitute to be able to do, so they are not particularly complex, but they are fine for the end of the year, especially if you have scraps of construction paper piled up in the art room.
The first project was a KINDERGARTEN one. The students use tracers for the body and wings. The dots are done in marker or crayon. Use a whole punch and a brass fastener to attach the wings to the body.
The second project would be suitable for SECOND or THIRD grade. This is a lesson with no tracer. Fold a piece of 8 x 10 black paper in half the long way ("hotdog") and draw just half of the outline of a bug body. Then cut it out. Make sure you are drawing and cutting on the folded side. When you open it up, you'll have a whole bug. Embellish with scraps of construction paper. Using whole punches of various sizes will make the spots interesting. Remember that the designs should be symmetrical.