Bugs

Something that may be kinda silly, that I was thinking about yesterday is that bugs/insects here in the northern part of the country are killed off annually by the cold weather.  In the southern part of the country it never really gets cold enough and they end up with more bugs.  Well, I wonder if prior to the advent of sophisticated man-made dwellings that are really freaking huge and warm as well as abundant, were there fewer bugs?  Think of how many insects and insect larvae are harbored in your house or garage...and your neighbors house and garage...and their neighbor...you get the point.  When the Native Americans ruled the continent and there weren't as many houses and they weren't as warm were there as many insects as there are today in the northern part of the US? Who knows.  Just a weird thought from a weird mind.