764 
ISLE OF WIGHT DISEASE IN HIVE BEES — PATHOLOGY. 
DESCRIPTION OF FIGURES. 
Fig. 1. Infected .trachea showing typical changes. The black faecal deposit is arranged in transverse 
lines, (x 70.) 
Fig. 2. Fragment of wall of infected trachea, shown much enlarged. Granular deposits of faecal matter 
lie between the tracheal thickenings. 
Fig. 3. Normal ( n ) and atrophied (a) fibres from the thoracic muscle of a crawling bee. Note the 
density, slenderness, and fractured ends of the atrophied fibres. ( x 50.) 
Fig. 4. Fragment of an atrophied muscle fibre showing dense longitudinal columns of sarcosomes 
from between which a few fibrillar remnants (/) project. ( x 500.) 
Fig. 5. A teased-out fragment of an atrophied muscle fibre (A) is contrasted with normal fibrillae and 
sarcosomes (B). ( x 600.) 
Fig. 6. Portion of atrophied muscle fibre showing blackened spots in its substance which follow the 
distribution of the tracheoles 
