Diseases of Bees, etc. 
71 
it will tempt them from their hive, and many 
may thus be lost. 
As to the parasites which sometimes attach 
themselves to the thorax of the bee, we cannot 
tell what causes them. We have noticed them 
not only in old hives in bad condition, to which 
their presence is attributed by some bee-masters, 
but also amongst fresh swarms and in new 
hives.^ 
In any case, there is no need to feel any 
anxiety with regard to this insect, as long as 
the hive is in good condition. 
Insect powders, which are so much recom- 
mended, are only, to my mind, useful for persons 
who have plenty of time to waste. 
Sometimes, towards the month of May, bees 
are subject to small excrescences on their heads, 
like little fleshy horns, of the colour of pollen. 
We have never been able to prove that these 
* In August, 1876, on examining one of my hives, I found 
the queen covered with these parasites, there being no less than 
seventy on her body and head. I removed them, and replaced 
her in the hive. She appeared to be in perfect health, and the 
same hive is this year in a most flourishing condition. 
N.B. — It appears as if the bees, when once attacked, are 
unable to free themselves from these insects, either by their own 
exertions or by the help of their companions. 
