K) 0( 



1916. 



Xosema Apis in Victoria. 



631 



A further examination of bees from the four colonies still infected 

 at Burnley was made by the Biologist on 18th and 29th January, 1916, 

 Avhen only one colonj^ (Xo. 195) remained slightly infected. 



The time for which the experiment was arranged having expired, 

 the colonies experimented with were returned to Tooborac in March, 

 1916. 



NosEMA Apis Investigation. 

 Summary of Microscopical Examinations made by Mr. W. Laidlaw. B.Sc. 



Control Colonies Left at Tooborai 



The experiment was started rather late in the season, and the con- 

 ditions as to ner'tar supply were unfavorable. I*ollon, however, was 

 always ]>lciitiful, which enabled the colonies to completely recover, only 

 tme Still showing N(>.><('iiia when the hives were returned to their former 

 locality. 



It seems evident that the destruction of Xo.scina-iiit'ected bees and 

 combs wbicli is insisted (in in Euroj)e is not necessary in Australia. 

 'J'he cau.sc of tbc les.scr virulence of the Xosema disease is probablv 

 climatic, the drier atmos])here and the greater heat of the sun during 

 summer arre-^ting the |in>grcss of the disea.se. 



