s 



CIRCULAR 3 92, U. S. DEPARTMENT OF AGRICULTURE 



into a decayed larva and withdrawn, the decaying mass adheres and 

 can be drawn out an inch or more in a gluelike thread. Decayed 

 larvae finally become dry and brittle. 



t\M,f 



Figure 4. — Symptoms of American foulbrood in pupae: A, healthy pupa; B-F, stages 

 in the decay and drying of pupae, ventral views. 



APPEARANCE OF THE DEAD BROOD 



The appearance and position in the cells of brood killed by x\meri- 

 can foulbrood are remarkably uniform. The dead larvae lie ex- 

 tended along the lower side wall with their posterior ends curved 

 part way up onto the bottom of the cells (fig. 3, G). There ma} T be 

 a small raised swelling near the head end of the scale, but this rarely 



