| 11. | Endoparasitic larvae are without spiracles and also operate under a closed system.
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| 12. | The underside is pale, as are the spiracle papillae.
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| 13. | Six to eight branches are found on the frontal spiracles.
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| 14. | At the posterior end of the larvae are a set of spiracles.
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| 15. | The spiracle plates and button are also not heavily sclerotized.
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| 16. | They are bright yellowish green above the spiracles, with yellow tubercles.
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| 17. | They are black with white spiracles and a brown head.
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| 18. | Spiracles are small and no spinules are on the integument.
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| 19. | Symphylans breathe through a pair of spiracles on the sides of the head.
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| 20. | The anterior spiracles ( prothoracic spiracles ) end bluntly and are not elongated.
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