28 



Egg-laying records of several species of ladybirds — Continued. 



Date. 



Adalia bipunc- 

 tata. 



A. bipunctata, 



var. humeralis. 



| Cocci- 

 Anatis 15-punctata. nella san- 

 guinea. 



Cocci- 

 nella 9- 

 notata. 



Coeci- 

 nella tri- 

 fasciata. 



June 3 





















28 



4 









16 















7 

















IS 



23 

 21 

 60 

 38 

 39 

 15 

 20 





8 









12 









15 



9 

















10 









6 











11 















16 



12 



















1 





13 









13 

 20 

 20 











14 

















15 













: 





16 

















18 



17 

















2 

 20 





19 

















12 



21 

















16 



22 



















20 



24 









13 













26 

























27 



















10 



28 









20 















Julv 4 



















15 



6 















19 



8 

















15 



13 

















18 



14 

















9 



15 

















5 



26 



















12 



27 



















15 



28 

















20 



30 



















19 



31 







;;:. ;.:;;:;; 









23 



Aug. 6 















2 



7 

















7 



9 















4 





















30 



122 



145 205 ! 71 



136 



73 



19 



251 





A pair of Adalia bipunctata var. hum* ralis (see column 3) was placed 

 in a jar with food April 13, and eggs were deposited on April 20 and 

 23. On May 3 the female was isolated, but continued to deposit eggs 

 for three weeks. The eggs, 105 in number, laid from that date until 

 May 20, hatched, but 18 laid subsequent to the 20th did not hatch. In 

 this case the female continued to lay fertile eggs for sixteen days after 

 being isolated. 



Several species of ladybirds were reared, and the number of days 

 spent in each stage is given below. In cases where more than one 

 individual of a species was reared the average number of days spent 

 in each stage is given in the table. 



Number of days spent in different stages of development by several species of ladybirds. 



Species. 



Egg. 



First 



Second 



Third 



Fourth 



Pupa. 



larval. 



larval. 



larval. 



larval. 



6 



6 



5 



5 



7 



9 



5 



6 



5 



6 



7 



9 



8 



6 



6 



5 



12 



9 



13 











8 



7 



10 



5 



9 



14 



7 



7 



5 



6 



5 



7 



7 



7 



6 



4 



2 



6 



6 











6 



4 



6 



8 



Adult to 

 adult. 



Adalia bipunctata 



Adalia bipunctata var. humeralis 



Anatis 75-punctata 



Chilocorus bivulnerus 



Mysia pullata 



Coccinella sanguinea 



Coccinella 9-notata 



Coccinella trifasciata 



