LIST OF FIGURES 



Figure Page 



1. A six-cell colony of S^. geminata . 14 



2. A miniature nest cell. 14 



3. Infrabuccal cavity. 24 



4. Enlarged view of infrabuccal cavity and 

 pellet. 24 



5. Diseased S. richteri pupa compared to 



healthy and diseased S^. geminata pupae. 36 



6. Diseased (left) and healthy male pupae 



of S^. geminata . 44 



7. Diseased (left) and healthy female pupa 



of S. geminata . 44 



8. Healthy (left) and diseased worker pupae 



of S^. geminata . 44 



9. The development of pathognomonic signs 

 in pupae of S^. geminata infected by 



B. dimorpha . 47 



10. Frontal section through the head of a 

 young (ca 10 days postpupation) pupa 



infected by B. dimorpha . 51 



11. Eye, optic nerve, and optic stalk of a 

 young (ca 10 days postpupation) pupa 



infected by B. dimorpha . 51 



12. Frontal section through the head of an 

 older (ca 16 days postpupation) pupa 



infected by B, dimorpha . 51 



13. Cuticle of a healthy pupa. 54 



14. Body surface of a pupa infected by 



B. dimorpha . 54 



VI 



