26 



Tesas Ageicultueal Experiment Station 



thermograph was placed inside the incubator and the records of the- 

 temperature and the humidity maintained in the experiments are shown 

 in table 24. 



The eggs were deposited by the moths in cages in the laboratory and. 

 the following morning they were placed in the incubator. The larvae 

 were supplied with ample food in the form of fresh eappings. The 

 larvae that hatched in a twenty-four hour period were kept together. 



The results of this experiment are shown in table 23. The eggs of 

 one batch were placed in the incubator over a period of one day. After 

 the first twenty-four hour period, the hatching was very slow, only 

 four to six larvae from a batch. The prolonged exposure in the in- 

 cubator dried the eggs badly and after a short time the eggs would not 

 hatch. The larvae started their work in the normal manner but this 

 condition was soon changed. 



Table 23 — Effect ol humidity on development. 



Eggs deposited. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. .5 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 



Dor-. 



Dec. 



Dec. 



Dec. 



Dec. 



Dec. 11 



Dec. 11 



Dec. 11 



Dec. 11 



Dec. 11 



1912.. 



1912... 



1912.. 



1912... 



1912... 



1912... 



1912.., 



1912... 



1912.. 



1912... 



1912.. 



1912.., 



1912... 



1912... 



1912.. 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912.. 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912.. 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



1912... 



Eges hatched. Larvae died 



Dec. 

 Dec. 

 Dec. 



13, 1912 



15. 1912 



16, 1912 



Dec. 

 Dec. 

 Dec, 

 Dec. 

 Dec. 

 Dec. 

 Dec. 

 Dec. 



16, 1912 



16, 1912 



17, 1912 



18, 1912 



19, 1912 



20, 1912 



22, 1912 



23, 1912 



Dec. 

 Dec. 

 Dec. 

 Dec. 



17, 1912 



16, 1912 



17, 1912 

 IS, 1912 



Dec. 

 Dec. 

 Dec. 

 Dec. 

 Dec. 

 Dec. 

 Dec. 

 Dec. 



2R, 1912 



24, 1912 



24, 1912 



26. 1912 



12, 1912 



16, 1912 



17, 1912 

 IS, 1912 



Dec. 

 Dec. 

 Dec. 

 Dec. 



17. 1912 



18, 1912 

 20, 1912 

 24, 1912 



Dec. 

 Dec. 

 Dec. 

 Dec. 



20, 1912 



21, 1912 



22, 1912 



23, 1912 



Dec. 

 Dec. 

 Dec. 

 Jan. 



20. 1912 

 2). 1912 

 27, 1912 

 2, 1913 



Dec. 

 Dec. 

 i >ec. 

 Dec. 

 Jan. 



22. 1912 



23. 1912 

 26, J912 

 28. 1912 



1, 1913 



Dec. 

 Dec. 

 Dec. 

 Dec. 

 Dec. 



23, 1912 



24, 1912 



25, 1912 



26, 1912 

 28, 1912 



Mar. 24, 1913 

 April 12, 1913 

 Mar. ,5, 1913 



April 5 , 

 Mar. 24, 

 April 12. 

 Mar. 24, 

 April 5, 

 Mar. 24, 

 April 12, 

 Mar. IS, 



1913 

 1913 

 1913 

 1913 

 1913 

 1913 

 1913 

 1913 



Mar. 24, 

 April 12, 

 Mar. 24 , 

 Mar. 24, 



1913 

 1913 

 1913 

 1913 



Mar. 24. 

 Mar. 24, 

 April 5, 

 April 5, 

 April 12, 

 Dec. 31. 

 Mar. 24, 

 April 12, 



1913 

 1913 

 1913 

 1913 

 1913 

 1912 

 1913 

 1913 



Mar. 24, 

 Mar. 12, 

 April 12, 

 Mar. 5 , 



1913 

 1913 

 1913 

 1913 



Mar. 24, 

 Feb. 26, 

 April 5 . 

 April 5, 



1913 

 1913' 

 1913 

 1912 



April 5 , 

 April 5 . 

 April 5 , 

 Feb. 21, 



1913 

 1913 

 1913 

 1913 



Mar. 12, 

 An.ril .'>, 

 Mar. 12, 

 April o . 

 Mar. 24, 



1913 

 1913 

 1913 

 1913 

 1913 



Feb. 21, 

 Feb. 26, 

 Mar. 24, 

 Mar. 24. 

 Mar. 24, 



1913 

 1913 

 1913 

 1913 

 1913 



Remarks. 



Work very unnatural. 

 Variation in size. 

 Very little growth. 

 No egg,« hatched. 

 Larva died. 



Larva one-third ?;rown. 

 Larva one-fourth grown. 

 Larva one-fourth grown. 

 Larva one-half grown 

 Very little work. 

 Larva one-fourth grown, 

 verv little work. 

 No eggs hatched. 

 Larva one-third .grown . 

 Very httle growth. 

 Larva one-half grown. 

 Very little growth. 

 No eggs hatched. 

 Larva one-half grown. 

 Verj' little growth. 

 Larva two-thirds grown.. 

 Larva two-thirds grown. 

 Larva one-third grown 

 Very little work. 

 Larva one-third grown. 

 Larva one-half grown. 

 No eggs hatched. 

 Larva one-third grown. 

 Larva one-third grown. 

 Larva one-third grown. 

 Larva one-third grown 

 No eggs hatched. 

 Very little work. 

 Very little work. 

 Lgrva one-fourth crown.. 

 Larva one-fourth grown- 

 -Nc eggs hatched. 

 Ver"/ little work. 

 Larva dried. 

 Larva onc-tliird grown. 

 Very little work. 

 No egg,s hatched. 

 I-arva one-fourth grown- 

 Larva one-fourth grown. 

 Very little work. 

 Very little work. 

 Larva two-thirds grown. 

 No eg.ps hatched. 

 Larva one-third grown. 

 Very little work. 

 Very little work. 

 Very little work. 

 Very little work. 



