118 ON SERICICULTURE. 



one very hot week the worms died rapidly, afterwards a 

 change came and the disease abated ; the eleven that died 

 turned yellow ; between their second and third moult dark 

 spots appearing at the tail, then at the base of the hairs near 

 the head, then extending down the body; they refused food, 

 and, unable to clasp the twig, ejected a dark fluid and died. 

 The disease appeared simultaneously with the intense heat, 

 which I am sure was the cause of it." 



Alexander Wallace, M.D. 



Trinity House, Colchester, Essex. 



