146 Tlie Rocky Mountain Locust. 



out-doors Dec. 26th, 1876. From that time till April 9th, the water 

 was frozen and completely thawed at nine different times, the ves- 

 sel containing them, which was of glass and admitted the sunlight, 

 several times breaking. The changes were as follows: Frozen till 

 Jan. 10th; then thawed till the 12th; then frozen till the 18th; then 

 thawed till the 20th; then frozen till the 26th; then thawed till Feb. 

 20th; then partly frozen till the 22d; then thawed till the 26th; 

 then frozen till the 27th; then thawed till March 5th; then frozen till 

 March 10th; then thawed till March 15th; then frozen till the 16th; 

 then thawed till the 24th; then frozen till the 25th. Examined on 

 the 7th of March only one pod was found rotten; the others appar- 

 ently sound. On the 9th of April, all with the exception of twelve 

 eggs were found rotten, the masses having become disintegrated 

 and the eggs for the most part lying singly at the bottom. 



Experiment 24. — Two egg-masses under same conditions as 

 in Expt. 23, till Feb. 9th, when they were brought in-doors and 

 placed in earth. One was dried up on the 16th; the other com- 

 menced hatching on the 27th, and when examined on March 7th, 

 all the eggs in it were found to have hatched. 



Experiment 25. — Two egg-masses under same conditions as in 

 Expt. 23, till Feb. 27th, when they were placed in earth in-doors. 

 Examined March 7th, they were found sound, and near the hatch- 

 ing point. On March 20th they commenced hatching. 



Experiment 25a. — Two egg-masses, under same conditions as 

 in Expt. 23, up to March 6th, were then placed in earth in-doors. 

 They commenced hatching March 23d, and continued till April 3d. 

 Subsequently examined, but eight out of the fifty-four eggs were 

 shrunken and dead. 



Experiment 25&. — Two egg-masses under same conditions as in 

 Expt. 23, up to March 27th, were then placed in earth, as above. 

 April 14th — 20th, ten hatched. Subsequently examined, the rest 

 were found rotten. 



Experiment 25c. — The twelve eggs remaining April 9th, from 

 Expt. 23, were placed in earth. Five out of the twelve hatched 

 April 20th — 26th. The rest were subsequently found rotten. 



These experiments establish a few facts that were some- 

 what unexpected. The insect is a denizen of the high and 

 arid regions of the Northwest, and has often been observed 

 to prefer dry and sunny places, and to avoid wet land, for 



