68 



CALOSOMA SYCOPHANTA. 



females each summer, 1 led during the summer of 1908 and died m 

 hibernation during the winter, while the other 2 fed in 1908 and 1909 

 and died in hibernation cages during the winter of 1909-10. 



To summarize, 1 male and 1 female lived one summer and died ill 

 hibernation; 2 females died at the end of the second summer; 2 males 

 lived two summers and died in hibernation the third winter; and 1 

 female lived three summers and hibernated three wmters. 



The record of a female received from Europe in July, 1907, is of 

 interest as it shows what may happen in nature if the conditions 

 are favorable. This female was kept in a jar with a male after 

 receipt, but laid no eggs and went into hibernation in the fall. Dur- 

 ing the following summer she was isolated in a jar containing earth 

 and supplied with food. The beetle survived hibernation and many 

 infertile eggs were dej^osited duiing the winter of 1908-9. A male 

 was supplied during the summer of 1909, during which time 106 

 fertile eggs were deposited, and the female died July 20. 



From the time of receipt until the date of death 2 years and 11 

 months elapsed, and this insect must have spent one winter in 

 hibernation in Europe and perhaps more before being collected for 

 shipment. In other words, the insect must have lived at least three 

 summers and passed three winters in hibernation. 



Among the beetles received from Europe in the summer of 1908 

 were 3 pairs from which were secured the following interesting 

 records concerning length of life. 



Table XVII. — Longevity of .J pairs of CaJosonni sijcophauin received J'roni Europe during 



the summer of 1908. 



The females in this table failed to lay eggs until the second summer 

 after receipt, and as soon as this was done they died. The length of 

 life in each case was at least 3 full years. The imported males did 

 not live so long, but their age at the time of receipt was unknoM^n. 



The table wliich follows gives data on the length of life of beetles 

 which were reared in the summer of 1908.' Each experiment was 

 closed as soon as the female died, and in case the male died another 

 specimen of the same age was added; hence more males than females 

 are accounted for in the table. 



