Last instar larva (caterpillar), annotated diagram for glossary. Here you can see the six true legs (also called thoracic legs
) and the (five or more?) sets of prolegs
, including anal and abdominal (or anterior) prolegs.
See also Lynette's diagram:
I had taken these shots of a Black Swallowtail caterpillar some time ago, intending them to illustrate the glossary item for prolegs, and Lynette beat me to it. Looking at them, I decided there was still value in adding them--with the details of the prolegs versus the true legs.