50 MAINE AGRICULTURAL EXl'KRIMENT STATION. I903. 



Experiment 9. Five long-wingecl and three short-winged 

 bugs were frozen between sheets of wet filter paper for seventeen 

 hours. Four long-winged and one short-winged forms revived 

 when thawed out. 



Experiment 10. Seven long-winged and one short-winged 

 forms were frozen in a block of ice for seventeen hours. None 

 revived when thawed out. 



Experiment ii. Five long-winged and two short-winged 

 bugs were frozen in a dry glass tube for seventeen hours. Three 

 long-winged forms revived after thawing out. 



The minimum temperature for experiments 7 and 8 was 2° 

 and the maximum was 16". For experiments 9, 10 and 11 the 

 minimum was 4° and the maximum 10°. 



Experiment 12. A small clump of J uncus was cut from the 

 ground, wrapped in paper and exposed for twenty-five days on 

 the north side of a building where it received no sun rays. It 

 was then picked to pieces and sixteen bugs were found, of which 

 eleven short-winged ones were dead, and three short-winged ones 

 and two long-winged ones were alive. During this exposure 

 the minimum temperature was 15° below zero and the maximum 

 was 45°. 



Experiment 13. A clump of J uncus was cut out of the ground, 

 wrapped in paper and exposed on the north side of the building 

 for forty days, when it was picked to pieces and found to con- 

 tain fourteen long-winged and thirty-two short-winged bugs 

 v."hich were dead, and nine long-wanged and seven short-winged 

 bugs which were alive. The minimum temperature for the forty 

 days was 15° below zero and the maximum was 52°. 



Experiment 14. Five long-winged and four short-winged 

 bugs were completely submerged in water for three hours, after 

 which all revived, the short-winged forms becoming active first, 

 -They were kept dry for seven hours and then again completely 

 submerged for eleven hours. All revived, were kept dry for 

 twelve hours and again completely submerged for seventeen 

 hours. All revived except one short-winged individual. After 

 being dry for twenty- four hours the remaining eight were sub- 

 merged for twenty-five hours, after which one long-winged and 

 one short-winged form failed to revive. Another short-winged 

 form died during the day. The remaining five were submerged 

 for thirty hours, after which the}' were kept dry for eighteen 



