B. C. ENTOMOLOGICAL PROCEEDINGS, 1912. 47 



Invariably tlie eggs noted in situ, as above, were laid singly and 

 individually, apparently devoid of any adhesive covering, consequently 

 easily detached from the place where laid. 



Adult female weevils are capable of laying 50 eggs each, as shown 

 by records of individual weevils in confinement and also hypothetically 

 shown by the multiplication of the average number of eggs laid in one 

 night by 59 female weevils, viz., 10.6, and the average individual period 

 of egg deposition, viz., 4.72 days. The maximum individual period of 

 oviposition is shown by notes in hand thus far to be 15 days. 



Period of Oviposition. 



Egg deposition for the generation as a whole began about the date 

 of June 22nd of this year (1912), and it continued until August 22nd, 

 a period of two months. During this period of oviposition a summer 

 migration evidently occurs. This year it took place for two weeks 

 around July 8th, midway in the oviposition period. The object of the 

 migration, whether it be for the purpose of distributing eggs on new 

 lands or for the purpose of rest, still remains dark. I have undoubted 

 proof that certain of the migratory individuals lay eggs ; furthermore, 

 there seems no doubt that the weevil has a strong tendency to remain 

 localized in one area, provided that area offers sufficient food and pro- 

 tection. 



Migration. 



In addition to the above-mentioned, there occurs a second migratory 

 period in the fall. This apparently is purely for the purpose of winter 

 protection and hibernation, but what proportion of the brood, in this 

 case again, travels at this time of year, still remains a question for 

 hibernating adults can be found the year round on the surface of the 

 ground in a strawberry plantation. 



Injuriousness. 



Crops of strawberries grown on the matted row system are not as 

 a rule seriously affected the first year from planting unless the ground 

 was previously infected. The injury is noticeable the third summer, 

 often reducing the crop fully 50 crates to the acre from what with 

 reason might be expected. When a plantation is kept down for more 

 than three years, the crop may be totally destroyed. 



When these points are understood, the object of rotation on a 

 small scale is interfered with and in many cases means no rotation at 

 all, for although the piece of ground down to strawberries changes one 



