I've seen LarbinWebCrawler coming from two IP addresses
213.114.34.219 and
213.114.34.232. It uses either "LarbinWebCrawler spider@download11.com" or "LarbinWebCrawler internet@bredband.net" user agent string. It does request robots.txt file, however I am not sure whether it follows robots.txt instructions. LarbinWebCrawler does not support HTTP compression.