202 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 fsecal 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 atropliied muscle fibre (A) is contrasted with normal fibrillai and 

 sarcosomes (B). ( x 600.) 



Fig. 6. Portion of atrophied muscle fibre showing blackened spots in its substance wliich follow the 

 distribution of the tracheoles. 



