9 



No. IV. 



NOTES ON THE COLLEMBOLA. 



THE PERIOD OF OVIPOSITION OF LEPIDOCYRTUS LIGNORUM. 



FAB. 



On the 12th of February, 1882, a $ of the above species was 

 observed in the act of oviposition. The fourteenth egg was 

 in the act of exclusion when seen, and after it had been 

 deposited, the abdomen was wriggled about from side to side 

 a little, and two minutes later the fifteenth egg rapidly made 

 its appearance for about half its diameter. Further move- 

 ment was so slow that the egg appeared to become stationary 

 until nine minutes after its first appearance, when it was 

 rapidly dropped. The wriggling movement was again 

 repeated, the sixteenth egg made its appearance a minute 

 later, and was dropped at the end of nine minutes. At length 

 thirty-four eggs were laid, and the following is an analysis of 

 observations of time (in minutes) : — 



No. of Egg. 



From 

 Appearance 



to time 

 of Dropping. 



Interval. 



Total. 



14th egg 





2 





15th „ 



9 



I 



IO 



1 6th „ 



9 



I 



IO 



17th „ 



9 



I 



IO 



1 8th „ 



9 



1 + 



IO+ 



19th „ 



Bf 





20th ,, 



( Recorded time be 



tween appearance 



I £ 



2ISt ,, 



< of 20th and that 



of 22nd was 24 





( minutes. 





f 12 



22nd ,, 









23rd „ 









24th ,, 



9i 



3 

 4 



io§ 



25th ,, 



9 





io± 



26th „ 









27th ,, 





2 





28th „ 



9 



If 



I of 



29th 



9* 



li 



io| 



30th „ 



9k 



I* 



ioj 



31st „ 



9 



I* 





32nd ,, 



1 of 



3 



I3l 



33rd • „ 



10 



3 



^3 



34th 



10 ? 







