REPORT OF THE STATE ENTOMOLOGIST I909 23 



3 and apparently none in cages 2 and 4. March 6 there were 

 2 living larvae in cage i ; 8 in cage 3 and i in cage 2, all being dead 

 in cage 4. 



Experiment 7, March 4, was a duplicate of experiment 6. 

 March 5 there was i living larva in cage i and all appeared dead 

 in cages 2 to 4. March 6 there was i living larva each, in cages 

 I, 2 and 3, while all were dead in cage 4. 



Experiment 8/ tried March 29, the exposure being 3 hours 

 and the amount of cyanide 4 drams. The caterpillars were all 

 apparently dead at the end of the fumigation, the finding being 

 confirmed by observations March 30th. 



Experiment 9, March 28, the exposure being 2 hours and 4 

 drams of cyanide being employed. The caterpillars appeared 

 to be dead at the end of the fumigation March 30th. One was 

 barely alive in cage 3 and all were dead April ist. 



Experiment 10, March 30, with an exposure of but 2 hours 

 and 2 drams of cyanide. The larvae were apparently all dead 

 at the conclusion of the experiment. March 31st there was i 

 alive in cage i ; 5 alive in cage 2 and 2 alive in cage 3. April 

 I, I was alive in each of cages i and 2 and 2 in cage 2. April 2, i 

 was alive in each of cages i and 2, the others being dead. 



Experiment 11, March 30, with an exposure of i hour and 

 2 drams of cyanide. All the caterpillars were apparently dead 

 at the close of fumigation. March 31 all were alive in cages 

 I and 2 and but 3 dead in cage 3. April i, 8 were alive in 

 cage I and all in cages 2, 3 and 4. April 2, 8 were alive in 

 cage I ; 9 in cage 2 and 4 in cage 3. 



Experiment 12, tried March 31st, exposure i hour with 6 

 drams of cyanide. All were apparently dead at the end of 

 fumigation. April i, i was alive in cage 3; all were dead 

 April 5. 



Experiment 13, March 31, an exposure of but i hour with 

 6 drams of cyanide. April i there was i larva alive in 

 cage I ; 5 in cage 2 and all in cage 3. April 2, 3 were alive in 

 cage I, 5 in cage 2 and all in cage 3. April 5, i larva was 

 alive in cage 2 and 7 in cage 3. 



Experiment 14, March 31, an exposure of >< hour with 6 

 drams of cyanide. April i all the larvae were alive in cage i, 



The caterpillars used in this and succeeding experiments of this 

 series were taken from nests on recently imported stock and received 

 at Albany, March 27, 1909. 



