Regarding the request for information:
I just noticed an article in the Alberta Bee News, May 1993.
It is Extra income from bee venom collecting, by M. Simics and C. Fogarassy.
There is a reference list with 11 entries, including Galuska, H 1972 Collection
of bee venom by means of electric current Zoologica Polloniae Vol 22 p53-69.
 and Charles Mraz, 1982 bee venom for arthritis. ABJ  p 121-123
 
There is likely something more recent.
 
 
(i've heard of a grid of fine wires with an electrical potential diff on
alternate wires. the grid with an underlying tray is inserted into a hive
entrance, and the bees try to  sting between the wires, depositing venom on the
tray.
good luck