434 THE GYPSY MOTH. 



No. 78. — May 9, 1894. Ten caterpillars, six days old, 

 were placed on lettuce leaves which had been treated with 

 Paris green, in the proportion of 5 lbs. to 150 gal. of water. 

 One died the first, three the second, two the third, three the 

 fourth and one the fifth day. 



Check experiment : one died the second day. 



No. 79.— May 28, 1894. Ten caterpillars, of the first 

 molt, were placed on lettuce leaves which had been treated 

 with Paris green, in the proportion of 5 lbs. to 150 gal. of 

 water. Five died the third, three the fourth and two the 

 sixth day. 



Check experiment : one died the third day. 



No. 80. — June 10, 1894. Ten caterpillars, of the second 

 molt, were placed on elm leaves which had been sprayed 

 with Paris green, in the proportion of 5 lbs. to 150 gal. of 

 water. Two died the second, three the third, one the fourth, 

 one the fifth, one the sixth, one the seventh and one the 

 eighth day. 



Check experiment : none dead. 



No. 81. — June 21, 1894. Ten caterpillars, of the third 

 molt, were placed on elm leaves which had been sprayed 

 with Paris green, in the proportion of 5 lbs. to 150 gal. of 

 water. Six died the second and four the third day. 



Check experiment : none dead. 



No. 82.— June 29, 1894. Ten caterpillars, of the fourth 

 molt, were placed on elm leaves which had been sprayed 

 with Paris green, in the proportion of 5 lbs. to 150 gal. of 

 water. Two died the second, two the third and two the 

 fourth day ; one died and one pupated the fifth day ; two 

 died the eighth day. 



Check experiment : one died the third day ; one pupated 

 the fourth day ; two died the fifth day. 



No. 83.— July 10, 1894. Ten caterpillars, of the fifth 

 molt, were placed on elm leaves which had been sprayed 

 with Paris green, in the proportion of 5 ll)s. to 150 gal. of 

 water. Two died the third day ; two pupated the sixth and 

 one the seventh day ; one pupated and one died the eighth 

 day ; two died the ninth day ; one pupated the eleventh 

 day. 



