Since the present edition was printed, Dr. G. F. 

 White, of the Bureau of Animal Industry at Washington, 

 has reported bacteriological experiments on foul-brood 

 and on black-brood which he has proven to be two differ- 

 ent diseases. "Bacillus aluei" has been found to be the 

 black-brood of New York and is now called "European 

 foul-brood" because it was first described in Europe. 

 The true foul-brood of the West is described by him as 

 "Bacillus larus" a.n& is to be called American foul-brood 

 to distinguish it from the other. 



Dr. Phillips, in circular No. 79, of the Bureau of 

 Entomology, thus describes black-brood now called 

 European foul-brood: 



"Adult bees in Infected colonies are not very active but do succeed 

 in cleaning out some of the dried scales. Tiiis disease attacks larvae 

 earlier tlian does American foul-brood, and a comparatively small per- 

 centage of the brood is ever capped; the diseased larvae which are capped 

 over have sunken and perforated cappings. The larvffi when first at- 

 tacked show a small yellow spot on the body near the head and move un- 

 easily in the cell; when deaih occurs they turn yellow, then brown and 

 finally almost black. Decaying larvas which have died of this disease do 

 not usually stretch out in a long thread when a small stick is inserted arid 

 slowly removed; occasionally there is a slight ropiness but this is never 

 very marked. The thoroughly dried larvae form irregular scales which 

 are not strongly adherent to the lower side wall of the cell. There is very 

 little odor from decaying larvae whjch have died from this disease, and 

 when an odor is noticeable it is not the "glue pot" odor of American foul- 

 brood, but more nearly resembles that of soured dead brood." 



The methods of treatment of both diseases do not 

 differ, and the McEvoy method seems applicable to both. 



See "Bacteria of the Apiary" U. S. Bureau of En- 

 tomology, Technical Series No. 14, by G. P. White, 

 Ph. D. 



