In the later stages the remains of the infected larvae become 

 dried down to scales, which are more or less firmly attached to the 

 lower walls of the cells. When the larvae become dark colored 

 and flattened down in the cells they usually become gluey and 

 stringy. If a toothpick is inserted into the decayed mass and 



Fig. 4. American foulbrood : a, b, f, normal 

 sealed cells; c, f, sunken cappings, showing 

 perforatipns; g, sunken capping not perfor- 

 ated; h, 1, m, n, q, r, larvae affected by 

 disease; e, i, p, s, scales formed from dried- 

 down larvae; d, o, pupae affected by disease. 

 Three times natural size. (B. F. Phillips, 

 Farmers' Bulletin No. 1084, TJ. S. Depart- 

 ment of Agriculture.) 



withdrawn, a long silky thread is drawn out, often two inches or 

 more, which, on breaking, snaps back like a rubber band. This 

 ropiness is one of the chief characteristics of the disease. However 

 too much dependence should not be placed on this ropiness as it 

 is not pronounced in some stages. When the disease is well ad- 

 vanced there can be detected a very pronounced odor similar to 

 that of heated glue. In milder cases and in the earlier stages this 

 odor is not always present. 



After the head and legs have formed the pupa may die of the 

 disease. Such a diseased pupa passes through the same stages as 

 does the diseased larva and finally dries down to a scale. In the 

 case of the dead pupa the tongue will occasionally be found pro- 

 jecting upward to the top of the cell. This is a certain indication 

 of American foulbrood. 



