INSECTICIDES. 445 



the seventh day ; oue pupated the tenth, one the fourteenth, 

 one the fifteenth and one the twenty-first day. 



4 lbs. Each Paris Green and Lime to 150 gal Water. 



No. 49. — 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 4 lbs. each 

 to 150 gal. of water. Six died the second and four the third 

 day. 



Check experiment : none dead. 



No. 50. — 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 4 lbs. each to 150 

 gal. of water. Five died the second, four the third and one 

 the fifth day. 



Check experiment : none dead. 



No. 51.— May 28, 1894. Ten caterpillars, of the fifth 

 molt, were placed on lettuce leaves which had been treated 

 with Paris green and lime, in the proportion of 4 lbs. each 

 to 150 gal. of water. Three died the fourth, three the fifth, 

 thi'ee the sixth and one the seventh day. 



Check experiment : none dead. 



No. 52. — June 10, 1894. Ten caterpillars, of the second 

 molt, w^ere placed on elm leaves which had been sprayed 

 with Paris green and lime, in the proportion of 4 lbs. each 

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

 three the fifth and four the seventh day. 



Check experiment : none dead. 



No. 53.— 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 4 lbs. each 

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

 one the fifth and two the sixth day. 



Check experiment : none dead. 



No. 54. — June 29, 1894. Ten caterpillars, of the fourth 

 molt, were placed on elm leaves which were sprayed with 

 Paris green and lime, in the proportion of 4 lbs. each to 150 

 gal. of water. One died the first, one the second, two the 

 third, four the fourth and two the fifth day. 



Check experiment : none dead. 



