drying condition they were placed in a desiccator for a period of 1 week to 10 days after it was confirmed that the larvae were completely dried they were submerged in water rehydrated 95 of the decerebrated and dried larvae were recovered 3 conventionally it has been considered that the preparation for the cryptobiosis of insects is advanced through a complex mechanism with the mediation of the central nervous system technical literature 3 however it has been found in the case of anhydrobiosis of p vanderplanki that the brain is not necessary for the induction of anhydrobiosis each tissue therefore responds to dehydration stress as in the case of plants and the preparation for anhydrobiosis is self containedly carried out this suggests that extirpated tissues can be dried in a recoverable state based on the findings of the above experimental examples the conditions for drying extirpated tissues medium composition or dehydration speed for example were determined the present inventors also found that the induction of trehalose synthesis was caused without the mediation of the central nervous system and thus that it is theoretically possible to dehydrate the extirpated tissues in a recoverable state based on the obtained information the conditions for dehydration of practically extirpated tissues were set in addition after these dehydrated tissues were rehydorated the present inventors established a method of conducting a viability test on these tissues fig8 the procedure of a method for dry preserving tissues of p vanderplanki larvae is as follows a final instar larvae were surface disinfected for 10 seconds with 70 ethanol and thereafter washed twice with distilled water b while placing the larvae in the distilled water the larvae were.