tube used to drink nectar (proboscis) Down 1. another name for butterfly larva (caterpillar)4. number of wings on an adult butterfly (four)6. feelers on a butterfly's head (antennae)7. a caterpillar is a butterfly in this stage of life (larva)9.middle body segment of an insect (thorax)10.umber of legs on an adult butterfly 17. tube used to drink nectar Down 1. another name for butterfly larva 4. number of wings on an adult butterfly 6. feelers on a butterfly's head 7. a caterpillar is a butterfly in this stage of life 9. middle body segment of an insect 10.