INSECTICIDES. 



479 



but one of these died before pupating, and this one did not 

 emerge. Foliage slightly burned. 



'No. 9. — July 8, 1893. A branch of oak was sprayed 

 with the same mixture and at the same time as in the pre- 

 ceding experiment, and ten fifth-molt caterpillars placed 

 upon it. Only one of these pupated, and that one did not 

 emerge. Foliage slightly burned. 



No. 10. — July 8, 1893. A branch was sprayed at the 

 same time and in the same manner as in the preceding 

 experiment, and ten fifth-molt caterpillars placed upon it. 

 July 22, and again on the 25th, the branch was resprayed, 

 on account of rain. Six of the ten caterpillars pupated, 

 three of which emero'ed. The foliao'e was somewhat burned. 



ANTmoATsriN." 



No. 1. — July 22, 1893. A branch of oak was sprayed 

 with antinonnin, in the proportion of 3 lbs. to 150 gal. of 

 water, and fifteen caterpillars of the fifth molt placed upon 

 it. July 24, the branch was resprayed, on account of rain. 

 Six of the caterpillars pupated, four of which emerged. Foli- 

 age in good condition. The antinonnin, when sprayed on 

 the leaves, presents a bright yellow, glistening appearance, 

 and badly stains everything with which it comes in contact. 

 It is also easily washed ofi" by rain. 



No. 2. — July 24, 1893. A branch of oak was sprayed 

 with antinonnin, in the proportion of 3 lbs. to 150 gal. of 

 water, and ten caterpillars of the fifth molt placed upon it. 

 Five of these pupated, three of which finally emerged. Foli- 

 age slightly burned. 



No. 3. — July 27, 1893. A branch of oak was sprayed 

 with antinonnin, in the proportion of 3 lbs. to 150 gal. of 

 water, and fifteen caterpillars of the fifth molt placed upon 

 it. Two of these died before beginning to pupate, and ten 

 pupated and emerged. Foliage in good condition. 



No. 4. — July 24, 1893. A branch of hop-hornbeam was 

 sprayed with antinonnin, in the proportion of 3 lbs. to 150 

 gal. of water, and ten fifth-molt caterpillars placed upon it. 

 Six of these pupated and finally emerged. Foliage quite 

 badly burned. 



