INFI.UKM K OF STARVATION OF I\-K<TS ON oFFM'KIXi.. 



ing eggs died in time. (The number of eggs which did not develop 

 at all was not larger than I per cent, of all eggs in the control 

 material as well as in that experimented upon.) The percentage 

 of eggs from which caterpillars hatched was approximately iden- 

 tical in thi> experimental material and in the control specimen-. 

 The same may be said as to the percentage of caterpillars which 



TABLE II. 



A average; EA probable error of the average; a standard deviation; num- 

 ber of specimen- \t-.\\. difference between the control and the experimental 

 material; Eit\n. probable error of this difference. 



DATA CONCERNING MAXIMAL DIAMETERS OF EGGS, IN p. 

 DIFFERENCES OF THE ABOVE AVERAGES. IN /i. 



>{ control females mated with starved malt 



238. oo 2.064 ' 44.35 2io 



Average* Compare*!. 



Diff. /:, 



Diff. 

 ''niff. 





I >:tterencc between the average size of 

 control eggs and of that of the eggs 

 from starved females mated with con- 

 trol males. 



I Mttrrence between the average size of 

 control eggs and of that of the eggs 

 from control females mated with 

 starved males. 



1. 08 ' nti.il. 



underwent pupation and of the chrysalids which de\ eloped into 

 adult moths (cf. Table I.). Pupation of caterpillars and hatching 

 of moths having been checked once daily during one and the 

 same hour, the limits of this life-period were determined with 

 exactness up to 24 hours. The data of Tables III. and I Y referring 

 to the duration of the larval and of the pupal life in the progeny 

 of starved females mated with control male- as \\ell .is the same 

 data of the control material (control 9 9 X cm mil ofd") show 

 that the duration of the larval life i- ixn eentially (hanged but 

 the duration of the pupal period of the offspring of the females 

 Hibjected to starvation ha> undergone e--cntial abbreviation. 

 The limits of larval growth lu\e been determined, as in the 



