22 



NEW YORK STATE MUSEUM 



Experiments with brown tail moth caterpillars (continued) 

 Series 5, March 2, 1909 



No. of 

 experiment 



No. of 

 cage 



Hight 

 of cage 



in 

 inches 



Drams 

 cyan- 

 ide 



I 



26 



2^ 



2 



20 



2 



3 



13 



2 



4 



6 





5 

 6 



I 

 0'' 





7 



0^ 





I 



26 





2 



20 





3 

 4 



13 

 6 





5 



I 





6 



o4 





I 



25 





2 



13 



2 



3 



I 



2 



4 



o5 



2 



Hours 



ex- 

 posed 



No. of 

 larvae 



Observations 



at end of 

 fumigation 



Later 

 observations 



I 

 I 



I 



I 



I 

 I 

 I 



2 



2 

 2 

 2 

 2 



2 



CO 



3 

 3 



3 



1 alive 



2 " 



I " 



I " 



6 " 



I " 



I " 



4 " 



Apparently all 

 dead 



Apparently 

 none alive . . 



All apparently 

 dead 



All apparently 

 dead 



All apparently 

 dead 



All apparently 

 dead 



2 alive March 3, 

 3 alive March 5 



4 alive March 3, 



3 alive March 5 

 7 alive March 3, 



5 alive March 5 

 7 alive March 3, 



4 alive March 5 



3 alive March 5 



5 alive March 5 



2 alive March 3, 



3 alive March 5 



2 a ive March 3, 



1 alive March 5 



4 alive March s 

 2 " "5 

 2 " " s 



I " " 5 



I " "5 



I alive March 4, 

 5 



All dead March 5 



I alive March 4, 



2 alive March 5 



All dead March 5 



^ Two drams equals i ounce to 100 cubic feet of space. 

 " Cage with end against side of box. 

 3 Standing on end on the bottom of fumigation box. 

 ■* Cage laid on bottom with both ends unobstructed. 

 5 Cage lying on bottom of box but in the far corner. 



Experiment 4, March 3, is a duplicate of number 3. At the 

 close of fumigation the larvae were apparently all dead, this 

 finding being confirmed by observations March 5. 



Experiment 5, March 4, is practically a duplicate of experi- 

 ments 3 and 4, except that the exposure was for but i hour and 

 4 drams of cyanide were used instead of 2 drams. At the close 

 of the fumigation a few larvae in cages i to 3 were apparently 

 alive, while those in number 4 appeared to be dead. March 5 

 cage I had 5 ; cage 2, 5 ; cage 3, 7 and cage 4, 9 living larvae. 

 March 6 there were 4 living larvae in cage i ; 4 in cage 2; 6 in 

 cage 3 and 9 in cage 4. 



Experiment 6, March 4, was a duplicate of experiment 5, 

 except that the exposure was continued for 2 hours. All the 

 larvae were apparenth^ dead at the end of the fumigation 

 period. March 5 there was i living larvae in cage i ; 5 in cage 



