1917 EXTOMOLOGICAL SOCIETY. 89 



tractor, who carted it away. Fatigue parties picked up all rubbish twice daily, 

 and later in the summer, sheet iron incinerators were provided, that burnt all 

 garbage, Avaste paper, liorse manure and camp sweepings. x\nd still the flies 

 increased ! If all the brigade areas were as well kept as was our own, I am at a loss 

 to explain the pest of house flies, as I could not discover any breeding places. In 

 the Quartermaster's stores, the Canteen, the Hospital and some of the office tents, 

 the men used Jeyes' fluid, which was issued from the stores, in the proportion of 

 one half to one pint per pail of water, for spraying around on tent walls and furni- 

 ture. This was fairly efl'ective as a preventive, and I shoAved some of the orderlies 

 how to make nets from wire and cheese cloth, which they used all the rest of the 

 simimer, taking keen interest in fly hunts for competition. 



One other point of Entomological interest occurred this summer. A private 

 in my companv, formerly a High School student and a boy of clean habits, was 

 admitted to the Base Hospital in Toronto for an abdominal operation. When he got 

 to Toronto he sufl'crcd with slight earache, and two days after admittance this in- 

 creased to intense pain, and he found newly hatched maggots crawling in his ear. 

 He promptly reported it to the doctor, wlio ordered irrigations of boracic acid, 

 followed by alcohol and bichloride, 1 to 8,000. After three days of this treatment, 

 all trouble ceased. To my disappointment, I found that neither patient nor doctor 

 had preserved any of the maggots, and they were not identified. 



In conclusion, hygiene on the march is much as I have outlined it for camp. 

 ]\Ieals cook in travelling field-kitchens as the wagons follow the column. The 

 water supply is inspected by the Medical Officer, who rides on ahead with a Field 

 Officer, to select a site for the camp. As soon as a force halts, temporary latrines 

 are dug as far away from the kitchens as possible, and after use are covered in and 

 marked with the letter " L " in stones or sods, as a warning for troops following 

 on behind. 



THE EXPERIMENTAL RESULTS IN APPLE :\rAC4G0T CONTPOL. 

 Prof. "\V. H. Brittaix^ Truro, N. S. 



The work of our department with the apple maggot began in 1913, when 

 an inspector, sent to investigate a report of this pest near Digby, uncovered a 

 severe infestation in that locality. One of the worst infested orchards was selected 

 for experimental purposes the next season. 



The work for the next two seasons was conducted by my assistant. Mr. C. A. 

 Good, who has given a full account of his work in the Report of the N. S. 

 Entomological Society for 1915. 



In the first 3'ear of our work, the mistake was made of spraying only a portion 

 of the orchard, leaving the rest as a check on our work. There Avas, it is true, a 

 decided advantage of the sprayed over the unsprayed portion, the former showing 

 an infestation oM2 per cent, in the fruit of all varieties, and the latter of 44.7 

 per cent. We also sprayed isolated trees in infested orchards, getting no reduction 

 in injury, one such tree showing an infestation of 99 per cent. From this it was 

 evident to us that it was useless to spray only a portion of the orchard, on account 

 of re-infestation of sprayed trees from neighboring unsprayed ones. 



In the meantime our inspectors had uncovered another severe outbreak of 

 thi.s pest in the neighlx)rhood of Windsor. Both the Digby and Windsor districts, 

 one situated on the west, the other on the east of the main fruit belt, afford 



