The head, thorax, and vestigial forelegs of this Monarch butterfly are visible in this 10X stereoscope photo. Monarch and other "4-legged" butterflies appear to have just 4 legs, but like all insects, they have 6. The first 2 legs are no longer used for walking. Note the puffy white spots on the butterfly's thorax. The next photo shows a 30X close-up of the spots.