REPORT OF THE STATE ENTOMOLO(jTST I909 



21 



Experiments with brown tail moth caterpillars 



Series 1, January 15, 1909 



1 . 

 3 • 

 6. 



7- 

 8. 



11 . 



12 . 



13- 



2 . 

 4. 

 5- 

 9. 



10 , 



14 



15- 



16. 



17 



18, 



5- 

 6. 



9 



10 , 



3 

 4 



7 



8 



1 1 



Number of 

 experiment 



Grains 

 cyanide 



Hours 

 exposed 



Number 



of 

 larvae 



Observations at 



close of 



fumigation 



Later observations 





I 

 I 

 I 

 I 



1 



i 



3 

 3 

 I 



21 

 I 



21 

 3 



i 



3 



21 

 3 



6 



4 

 4 

 4 

 4 



4 

 5 

 4 



4 &nest 



4 " 



4 



4 

 4 & nest 



4 



All dead 



Same, i8th, 20th 









8 



Apparently dead . . 

 Dead 



T alive on i8th and 20th 





Same, i8th and 20th 





2 alive 



4 alive 1 8th and 20th 



2 



Dead 



Same, i8th, 20th 









3 alive i8th- 2, 20th 

 Exposed caterpil- 

 lars dead 



Apparently dead. . . 



All dead 



Alive in nest 







6 



All exposed caterpillars 

 dead i8th, 20th most in 

 the nest dead 



Apparently dead i6th, i 



7 



alive the i8th, all dead 

 the 20th 

 Same, i8th, 20th 





2 alive 



2 alive the 20th, those in 



1-2 



Exposed caterpil- 

 lars dead 



nest alive 





Same, i8th, caterpillars in 

 nest alive 



6 

 6 

 5 

 5 

 4 

 4 

 3 

 3 

 6 

 6 

 5 

 5 

 21 

 4 

 4 



21 



3 

 3 



Series 2, January 20, 1909 

 Dead 



Apparently dead. 



Same, the 2xst 



Series 3, January 21, 1909 

 Dead 



Alive 



Apparently dead. 



Dead 



Apparently dead. 



Dead 



Series 4, January 28, 1909 



All apparently dead 



10 

 10 

 10 

 10 

 10 

 10 



I alive 2ist, 2 2d 



Same, the 2 2d 



Same, 22d, 23d 



Several alive the 23d, 

 small piece of web pres- 

 ent 



Same, the 22d 



Several alive the 23d, 

 pieces of nest present 



Same, the 23d 



All dead the 3 



* ^ grain equals approximately i ounce to 100 cubic feet of space. 



