How do I find one of the bugs when I have been everywhere for days and no catepillars show up? :/

I go for about four days, and then my own solution to this is to buy one. Chamalma doesn't care where the bug comes from.
oh, duh! Thank you! I am not sure why I didn't think of that!

Are you using the CSS that makes floating items appear in the corner of the page? If not, you could be missing the bugs when they appear. This will make them easier to spot, if you don't have it already.
.floating_item { position:fixed !important; left:200px !important; top:45px !important; z-index:999 !important; }
I've gathered several bugs now, and they've all appeared within a few page loads of accepting the quest.
Yes, I am using that code, thank you!

I have the CSS too, and was wondering if my code was broken when I got stuck on a bug.
I've had one appear on the very page she requests it. OTOH I've sometimes played several hours scratching cards and battling and questing and other refresh-heavy things until the critter appears. If it takes a few days of this so that I've even forgotten I'm looking for it? No longer a fun part of the game, I will make someone happy by dropping some sP their way.