ON ISLE OF WIGHT DISEASE IN HIVE BEES — ETIOLOGY. 
745 
Table II. 
The following illustrates the progress of infection as observed in the periodic 
examination of 4 stocks of the same apiary : — 
Date. 
Locality. 
Condition 
of Stock. 
Number 
Examined. 
Tarsonemus.' 
20 May 
1 July 
Fintry No. 1 
H. 
H. 
6 
3 
Flying bees. 
3 Aug. 
,, 
S. 
7 
7 Crawling bees. 
» 
s. 
5 
4 Fliers. 
20 May 
Fintry No. 2 
H. 
5 
0 Fliers. 
8 June 
H. 
8 
2 Fliers. 
3 Aug. 
>» 
S. 
4 
4 Crawlers. 
20 May 
Fintry No. 3 
H. 
24 
0 Fliers. 
8 June 
H. 
16 
1 Fliers. 
1 July 
S. 
10 
3 (8 fliers, 2 crawlers). 
3 Aug. 
.. 
s. 
22 
22 Crawlers. 
20 May 
Fintry No. 4 
H. 
15 
0 Fliers. 
3 Aug. 
S. 
6 
6 Crawlers. 
The data set forth in the foregoing Tables are thoroughly representative of our 
results as a whole. Examination of the figures quoted will show : — 
1. That in every case of a “ Sick” stock, Tarsonemus was present in the stock, 
and in a high proportion of cases it was found in every bee examined. 
2. That in the majority of stocks marked “ Healthy,” Tarsonemus was not 
found. 
3. That in a proportion (36 per cent.) of supposed “ healthy ” stocks, Tar- 
sonemus was found. Of these within the period of observation (five 
months at most) a proportion eventually developed the usual symptoms, 
and died out from the disease. A proportion died out without having 
shown the symptom of “ mass crawling,” and a few remain apparently 
healthy. 
Regarding the admittedly diseased stocks in which Tarsonemus has been found, 
we deem further illustration unnecessary. Concerning those other cases, some of 
which may appear to present difficulties, we consider it important that details should 
be submitted, and of these we now quote typical examples. 
For ease of comparison the main facts regarding each are summarised at the end 
of the series. 
TRANS. ROY. SOC. EDIN., VOL. LII, PART IV (NO. 29). 
116 
