INSECTICIDES. 437 



molt, Avere placed on lettuce leaves which had been treated 

 with Paris green and lime, in the proportion of ^ lb. each 

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

 two the sixth, one the seventh and two the eighth day. 



Check experiment : none dead. 



No. 4. — June 10, 1894. Ten caterpillars, of the second 

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

 Paris green and lime, in the proportion of ^ lb. each to 150 

 gal. of water. One died the fourth, one the sixth, four the 

 ninth, two the tenth and two the eleventh day. 



Check experiment : none dead. 



No. 5. — June 21, 1894. Ten caterpillars, of the third 

 molt, were placed on elm leaves which had l)een sprayed 

 with Paris green and lime, in the proportion of J lb. each 

 to 150 gal. of water. One died the fourth, four the sixth 

 and five the seventh day. 



Check experiment : none dead. 



No. G. — 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 ^ lb. each 

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

 fourth, fifth, sixth and seventh and three the eighth day. 



Check experiment : one pupated the sixth day. 



No. 7.— 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 ^ lb. each 

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

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

 one died the fifth, one the eighth, one the ninth and two the 

 tenth day. 



Check experiment : two pupated the fifth day ; one died 

 and one pupated the eighth day ; one pupated the ninth day. 



No. 8 (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 ^ lb. each to 150 gal. of water. One died the 

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

 the tenth, one the fourteenth, one the sixteenth and four the 

 eighteenth day. 



