302 



tte mite was left behind. It has consequently been increasing steadily 

 and in some localities is very abundant ; had the mite been liberated 

 in the early centres of infestation, the present situation with regard 

 to the scale would probably be much less serious than is actually the 

 case. 



Bbittain (W. H.). Further Notes on the Apple Maggot (1918), 



Rhaqohtis pomonella, Walsh.- — Proc. Eniom. Soc. Nova Scotia for 

 WIS, Truro, February 1919, pp. 15-23. [Received 21st May 

 1919.] 



Observations on Rhagoletis pomonelh, Walsh (apple maggot) made 

 during 1918 are recorded, supplementing the work of previous years 

 [see this Review, Ser. A, vii, p. 177]. A table shows the emergence of 

 adult flies from out-of-door cages. The date of the first emergence 

 was 14th July, approximately the same as in previous years, and it 

 is evident that whether the season be early or late the time of emergence 

 is practically the same ; this fact should have an important beaiing 

 on the control of the pest. 



Another table shows the emergence of adults according to the variety 

 of fruit from which they were derived. Observations on the pre- 

 oviposition period indicate that there is not much difference between 

 free and captive flies in this respect. Oviposition begins in from one 

 to two w^eeks after emergence and continues for about one month. 

 Flies kept in captivity have lived as long as six weeks, though the 

 average was much less. They survive longer in cooler weather. 

 The foregoing data all indicate the necessity when spraying of having 

 the fruit thoroughly coated with the poison when the flies first appear 

 and of keeping them so covered during the period of maximum 

 emergence. 



Payne (H. G.). The Salt Marsh Caterpillar {Esligmene acraea, Drury). 

 • — Proc. Entom. Soc. Nova Scotia for 1918, Truro, February 1919, 

 pp. 24-31, 1 plate. [Received 21st IVLay 1919.] 



Estigmene acraea, Drury, is a moth that is widely distributed over the 

 greater part of Canada, the United States and IVIexico, and its popular 

 name is misleading, since it attacks many crops and is by no means 

 confined to salt marshes. In Nova Scotia, as in other parts, reports 

 indicate that outbreaks of it are generally local in character, and 

 rarely serious. During the last two years frequent complaints have 

 been received from various parts of the Province of damage to all 

 kinds of garden and field crops. Females have been found depositing 

 large masses of eggs on potato, sunflower, apple, nasturtium, onion 

 and many other plants. This occurs from 1st to 10th July, and the 

 young larvae emerge about fifteen days later and feed at first on 

 the tenderest parts and later often consume the whole leaf. After 

 the sixth moult the caterpillars feed ravenously for a time and then 

 scatter, generally pupating under loose bark, fences, boards of buildings, 

 etc. The winter is passed in the pupal stage, the adult moths emerging 

 during the early part of the following July. The stages of the insect 

 are described. While no natural enemies have been obtained in the 



