There are some benefits to contribute it. one, they can get enough sperm to satisfy female's fecundity; two, females can select optimal sperm to produce excellent offspring; three,it may benefit to evolution and the production of diversity. However, such patterns are likely to increase potential harmful effects, such as bacterial infection, toxic material in sperm or physical damage caused by genital alpines, and predation risk considering the lose of vigilance and the increased probability of exposure to predator.

Hi,

among honey bees, you find Apis dorsata leading.., the queen mates with > 40 different males

Have a look on the summary chapter here:

http://entnemdept.ifas.ufl.edu/walker/ufbir/chapters/chapter_36.shtml

and of course in the book "Honeybees of Asia" (Hepburn & Radloff Eds.), in Chapter 8 from N. and G. Koeniger about more recent citations and data.

Best,

Martin