INSECTICIDES. 447 



to 150 gal. of water. Four died the second, one the third, 

 two the fourth, two the fifth and one the sixth day. 



Check experiment : none dead. 



No. 61. — 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 5 lbs. each 

 to 150 gal. of water. Two died the second, one the third, 

 two the fourth, two the sixth, two the seventh and one the 

 eighth day. 



Check experiment : one died the seventh day. 



No. 62. — 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 5 lbs. each 

 to 150 gal. of water. Two died the second, four the third, 

 three the fourth and one the sixth day. 



Check experiment : none dead. 



No. 63.— 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 5 lbs. each 

 to 150 gal. of water. Two pupated and two died the second 

 day ; one died and one pupated the third day ; one died the 

 seventh and three the eighth day. 



Check experiment : two pupated the third day ; one died 

 and three pupated the fifth day ; one pupated the eighth 

 day. 



No. 64 (field experiment). — July 7, 1894. Ten cater- 

 pillars, of the fifth molt, were placed on willOw branches 

 which had been sprayed with Paris green and lime, in the 

 proportion of 5 lbs. each to 150 gal. of water. One died the 

 fourth, one the fifth, one the sixth and one the seventh day ; 

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

 one was lost the fourteenth day ; one pupated the thirty- 

 third day. 



6 lbs. Each Paris Oreen and Lime to 150 gal. Water. 



No. 65. — April 26, 1894. Ten caterpillars, three 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. Six died the second, three the third 

 and one the fourth day. 



