This process is called sublimation. The opposite (deposition) is where a gas turns directly into a solid. Sublimation occurs if the pressure and temperature are right for the specific substance, so that the solid phase in a phase diagram borders the gas phase.
Most cicadas go through a life cycle that lasts from two to five years. Some species have much longer life cycles, such as the North American genus, Magicicada, which has a number of distinct broods that go through either a 17-year or, in some parts of the world, a 13-year life cycle.
Cicada eggs take between six and ten weeks to hatch. The eggs are  laid in slots which the female carves into twigs with her  ovipositor. After hatching, the nymph fall to tâ¦he ground where they  burrow down 15-45 cm underground. Depending on the species, cicadas  may spend from 2 to 17 years as nymphs underground, but contrary to  what some may believe, this is not how long the actual eggs take to  hatch.