[symstym]

It was fruit juice and boric acid.. not sure what came of it.

http://www.nytimes.com/2011/09/27/health/27mosquito.html

[pikewood]

This article in MotherEarthNews had a commenter who stated that this trap also attracted other insects, including bees (which the boric acid is also fatal to). So, even if it is effective, unfortunately it seems that it's too indiscriminate.

http://www.motherearthnews.com/diy/homemade-mosquito-trap-zm...

[StavrosK]

Yep, that's the one! Hmm, I might give it a shot.