| 1. | They have three pairs of true legs, but no prolegs.
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| 2. | They have 6 small legs and two rudimentary hind prolegs.
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| 3. | When mature, the caterpillar is brown with purplish prolegs.
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| 4. | Ventrally whitish, with black patches in between prolegs and true legs.
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| 5. | Larva sub-cylindrical, with all prolegs present and well developed.
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| 6. | The legs are green and the prolegs are red in these mature larvae.
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| 7. | The caterpillar hooks its anal prolegs into the silken lining of the bag.
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| 8. | The prolegs on the abdomen are highly formed with large anal claws terminal.
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| 9. | The true legs are black and the prolegs are yellow with black tips.
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| 10. | Maggots are limbless, or else have small prolegs.
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