12 CIRCULAR 3 92, U. S. DEPARTMENT OF AGRICULTURE 



figure 5. — Symptoms of European foulbrood: A-C, Larvae at the earliest age at 

 which they may be attacked by the disease; A, earliest symptoms; B, more advanced 

 symptoms; C, scale of a larva that died at this age; D, healthy larva of slightly 

 older age; E, sick larva of this age; F, scale of larva of this age; G, healthy larva at 

 the oldest age that larvae normally remain coiled on the bottom of the cells; H, I, 

 larvae of this age dead of European foulbrood; J, healthy larva just before the cell 

 is capped; K, L, larvae of this age dead of European foulbrood; M, dead larva that 

 has been partly removed by the bees; N, discolored and sunken capping over a 

 dead larva; O, punctured capping over a dead larva. 



