One of my worst 'insect bite' incidents was involved with ants. There seemed to be three different varieties at the place i was living, really tiny miniscule ants ( the smallest I'd ever seen) , medium sized ( nasty agressive bastards), and huge big mutha ants (seemed to be non aggressive). Basically i kept getting woken up in the middle of the night, with an intense pain just like a wasp or bee sting ( i've had several of both ). Only to find a single medium sized ant in my bed !
I then set about insecticiding my entire room using a spray and a crawling insect spray called Piff-Paff , it is normally brilliant stuff. I also practically hermetically sealed my bedroom, spending almost an entire day filling in every single hole and crevice with silicon sealant - except for one !
A few days later i was sitting on my bed and an ant appeared from nowhere ! I looked up and found that there was a tiny ant sized hole in the ceiling right above my head. Silicon gun at the ready I sealed up any holes in the ceiling and the problem wen't away.
I also took the trouble to terrorise the ant that I'd managed to catch. Their defence and attack method was really nasty chemical warfare. I used a pencil to piss it off and basically first of all they used their jaws to bite the pencil, then whilst still gnashing away, they bent their bodies and sprayed a liquid into the bite ! I've since found out that this liquid is an acid which is why it caused me so much pain.
Horrible,horrible little creatures, when they attack you, but brilliant to watch on the discovery channel
