Isle of Wight Disease in Hive Bees. 25 
apiary number, A9. Next day a letter was received from Bayble stating that 
the other stock of driven bees had begun to crawl on the same day. The 
symptoms in both cases were those of Isle of Wight disease; bees emerged 
on the alighting board and did not fly, some eventually fell off the board on 
to the ground where they collected in little clusters, finally dying of cold and 
hunger. Bees of this stock continued to die in this way at Stornoway till 
2nd March. On this date the survivors were killed and the hive and ground 
disinfected. Caustic soda was spread upon the soil, which was then turned 
over, and all the combs and quilts were burned. The Bayble stock was also 
killed off and the hive disinfected. | 
Second Attack. Two Stocks affected, B14, C13.—On the 6th October 1911, 
two other stocks in Stornoway Apiary began to crawl. On this occasion, 
samples of living bees were sent for diagnosis to Dr Graham-Smith, Cambridge, 
who reported “young stages of Nosema apis in both stocks.” Spores were 
apparently not observed, and it was not stated whether the examples seen 
included intracellular forms. One of these stocks (B14) consisted of American 
Golden Bees, and in their case crawling ceased after a few days; on 14th 
October they were busily engaged once more carrying in pollen. They 
wintered in excellent condition, built up rapidly in spring, and never showed 
any further sign of Isle of Wight disease. They were not again tested for 
Nosema. Unfortunately the queen died of old age, 15th June 1912, and the 
strain became extinct. The noteworthy feature in the case of this stock is 
that the symptoms, although associated with the presence of Nosema, 
disappeared in a few days. . 
The other stock (C13) which consisted of black bees, became rapid] y worse, 
and, on 12th October 1911, it was destroyed. These two stocks stood side 
by side. 
D1 
Arrangement of Stocks, October 1911. 
Third Attack.. One Stock, No. D1.—Crawling bees were first observed in 
front of this stock, the position of which is indicated above, on 20th January 
1912. The bees were a black stock, numerous, and having abundance of 
natural stores. It had wintered in excellent condition. Samples were again 
sent to Cambridge, and Dr Graham-Smith reported the presence of all stages 
of Nosema. 
