Distinguishing between Adsense and Content Bots

Is there a different crawl bot for adsense and content.

[Taiwan_Paul]

This is how the Google bot crawler shows up in my stats:

crawl-66-249-66-231.googlebot.com
crawl-66-249-66-203.googlebot.com
crawl-66-249-65-99.googlebot.com
crawl-66-249-65-171.googlebot.com
crawl-66-249-66-42.googlebot.com
crawl-66-249-65-233.googlebot.com
crawl-66-249-65-132.googlebot.com
crawl-66-249-66-18.googlebot.com

Is there a way to tell if it's crawling for content or for Adsense content? I ask because my site was dropped recently (don't know why, I don't think I was doing anything wrong), and some of the bots seemed to have stopped hitting my site while others and new ones still keep on coming. I thought if you got a ban they stopped crawling.

[Brett_Tabke]

ck the agent name.

[BillyS]

Mediapartners-Google/2.1 = Adsense Crawler
Googlebot/2.1 = Index Crawler

[Taiwan_Paul]

Thanks.