448 THE GYPSY MOTH. 



Check experiment : none dead. 



No. 66. — -May 9, 1894. Ten caterpillars, six days old, 

 were placed on lettuce leaves which had been treated with 

 Paris green and lime, in the proportion of 6 lbs. each to 150 

 gal. of water. One died the second, three the third, three 

 the fourth and three the fifth day. 



Check experiment : one died the third day. 



No. 67.— May 28, 1894. Ten caterpillars, of the first 

 molt, were placed on lettuce leaves which had been treated 

 with Paris green and lime, in the proportion of 6 lbs. each 

 to 150 gal. of water. Six died the third, two the fourth, 

 one the fifth and one the sixth day. 



Check experiment : none dead. 



No. 68. — June 10, 1894. Ten caterpillars, of the second 

 molt, were placed on elm leaves which had been treated with 

 Paris green and lime, in the proportion of 6 lbs. each to 150 

 gal. of water. Three died the second, three the third, two 

 the fifth, one the sixth and one the seventh day. 



Check experiment : none dead. 



No. 69. —June 21, 1894. Ten caterpillars, of the third 

 molt, were placed on elm leaves which had been sprayed with 

 Paris green and lime, in the proportion of 6 lbs. each to 150 

 gal. of water. Two died the second, one the third, two the 

 fourth, one the sixth and four the seventh day. 



Check experiment : one accidentally killed the seventh day. 



No. 70. — June 29, 1894. Ten caterpillars, of the fourth 

 molt, were placed on elm leaves which had been sprayed 

 with Paris green and lime, in the proportion of 6 lbs. each to 

 150 gal. of water. Six died the second, two the third and 

 two the fourth day. 



Check experiment • one died the third day. 



No. 71.— July 11, 1894. Ten caterpillars, of the fifth 

 molt, were placed on elm leaves which had been sprayed 

 with Paris green and lime, in the proportion of 6 lbs. each to 

 150 gal. of water. One died the first day; one died and 

 two pupated the second day ; one died the third day ; one 

 pupated the fiith day ; three died the seventh and one the 

 eleventh day. 



Check experiment : one pupated the third day ; one died 

 and four pupated the fifth day ; one died the tenth day. 



