746 DR JOHN RENNIE, MR PHILIP BRUCE WHITE, AND MISS ELSIE J. HARVEY 
Stock Records. 
R. No. 1 . — This stock at the end of May was covering fully twenty frames and 
was in very good condition. On the 22nd of this month twelve bees taken entering 
the hive were examined for the presence of Tarsonemus. Two of the twelve were 
found affected at the initial stage. The parasites were few and the tracheae were 
perfectly clean. As stated, there were no signs of disease. About a month after- 
wards the stock, which meantime had worked well and shown no signs of disease, was 
again examined. On this occasion fifty-two bees were searched, and of these forty- 
three contained the parasite. In most cases the tracheae were heavily infected but 
the tubes were comparatively clean. A further sample was obtained upon the 6th 
July, and at this time twenty -five bees out of a total of twenty-eight taken were 
infected. It should be stated that these bees were taken at random by shaking off 
a frame into a box placed below. A number of these showed a bronzing of the 
tubes, especially at the forks. By this time the bees were showing some listlessness 
and not working so well. The owner made an artificial swarm, removing the old 
queen and supplying the main stock with a virgin Italian queen. Twenty-three 
pounds of drained honey were obtained at this time. The two stocks were 
subsequently placed side by side. On 21st July, in a sample of thirty-five bees, 
twepty-eight contained the parasite. About the third week of August, after a period 
of cold weather, crawling became evident in both stock and swarm. About the end 
of August a sample of twenty-eight bees was supplied from the parent stock, and of 
these twenty-six were badly parasitised. Both stocks continued to crawl in large 
numbers, and as robbing by other bees was going on, the owner destroyed them 
about the end of September. 
No. 44. — This stock was obtained upon 11th April from an apiary which has 
been in existence for many years, and in which Isle of Wight disease has never 
been known. It was placed on the date mentioned in a new hive upon its own 
frames in an experimental apiary in which there were stocks suffering from Isle of 
Wight disease. The stock progressed normally throughout the summer and by the 
middle of June the bees were working in a super. On the 26th May an examination 
made on two bees taken from the stock showed one to be infected with Tarsonemus. 
Two days later one out of eight was found similarly affected. Subsequently, 
periodic examinations as follows were made on the dates mentioned. 
Date. 
No. 
Examined. 
Result. 
Infected. 
Not 
Infected. 
12 June 
31 
3 
17 
22 July 
10 
5 
5 
31 Aug. 
33 
32 
1 
