[Aric2000]

I'll take a stab at it.

If an insect or an organism fits it's environment or more then one environment, then, natural selection has no place in separating it's stronger genetic traits from the rest. In other words, they DON'T die because of natural disasters, environmental changes etc.

They survive to old age and reproduce, and their mutations are so spread out through the gene pool, that it makes no REAL changes in the species itself. If there is no drive for natural selection, then there will be no drive for a species to change, therefore, it's genetics mutations remain spread out, and have no real effect.

I am sure someone will correct me if I am wrong in specifics, or if they want to get more specific, but that is pretty much the basic gist of it.

[PatrickHenry]

That's good. Also, there are over 3,000 mosquito species. So evolution appears to have done its thing. I don't know what other, different-looking insects may be descended from some long-ago mosquito mutations. Just because bugs don't wear signs telling us "I'm a distant desdendant of a mosquito," isn't any reason to assume that there aren't many such. A specialist would be able to tell us. In any event, the mosquito certainly hasn't remained static, although I wouldn't be surprised to learn that there are still examples around of the original stock. Such survival is not a contradiction of the theory. After all, we still have bacteria with us.

[plusone]

Yes, I agree with that summary. In an ideal environment, there would be no pressure for these bugs to change. True, the changes would still be offered up by random chance, but when livin' is good, the forces of nat sel don't weed out the good from the bad. But not everyplace is such. There are harsh environments that m/s live in. You would think after 500 million tries, something less 'mosquito-like' would appear?