LEMONGRASS is an excellent bug repellent.  PURIFICATION is also excellent (it contains both lemongrass and citronella).  Interestingly, I find that in Singapore Purification is better; in Bali Lemongrass is more effective.

NOTE:  Some people find that the skin on the fingers used to apply Lemongrass and/or the skin on which they apply it may become slightly yellow in color.  This is especially noticeable around the fingernails, so be careful when applying it repeatedly.