24 



ing to climb the walls of the box they fell down unfailingly. When 

 falling 011 the back great exertions had to be made to get 011 the 

 feet. They often raised themselves on the hind legs trying to fly, 

 hut the weight of the swollen abdomen made flight impossible and 

 they usually fell on the back. July 15. Nine of the bees dead; the 

 rest apparently much afTected. July 16. The rest dead. 



Series II. 



July 17. 9 bees were caged. 0.4 grams of mycelium and spores 

 were mixed in 5 c. c. honey. July 18. A few were aifected and 

 had black and swollen abdomens. July 19. Four dead, the ab- 

 domens swollen and glossy black. Three more djdng. July 21. All 

 of them dead. 



Series III. 



July 23. 12 bees were caged. O.i gram fungous material was 

 mixed in 10 c. c. honey. July 24. No sure signs of disease could be 

 detected. July 25. One dead; several drowsy and swollen. July 

 26. Nine dead, greatly swollen. The remaining swollen and 

 drowsy, falling on the back when trying to climb the walls of the 

 box. July 27. All dead. 



The bees poisoned with Mucor Mucedo were usually very much 

 swollen. Dissection showed both ventriculus and rectum dilated 

 and filled with spores of the fungus. In many cases germination 

 had taken place, the spores having put forth germtubes of consi- 

 derable length. 



Cladosporium herbarum Pers ) Link. 



July 2,3. 12 bees were caged. 0,i gram fungous material was 

 mixed in 10 c. c. honey. July 2 i. No signs of disease could be 

 detected. July 25. One be dying. July 26. Four dead, rather 

 swollen. (Two were found drowned in the honey). July 27. One 

 more dead; the remaining very drowsy. July 28. One more dead; 

 three dying showing very characteristic signs of paralysis. They 

 crawl along with great difficulty on account of the swollen abdo- 

 men, fall on the side stretching the free hind leg fumbling in the 

 air and scratching the abdomen from time to time. One of them 

 shows powerful trembling of wings and body. July 29. All dead. 



No germination of the spores had taken place in the body of the 

 bees. 



