> I recently came across mention of a device called an Apidictor. Is
> there a modern equivalent,  and/or has the concept been developed
> elsewhere?
> I am wondering if any of the list members has any experience of
> using it, or an equivalent, or knows somebody with such experience.
 
Take a look at: American Bee Journal 135(9): 615-618.
 
You can even order bibliography covering the subject from IBRA.
 
\vov