There is a picture of prominently displayed at:
http://www.cat.com/products/equip/bhl/bhl.htm
The backhoe portion is the rear-end attachment used to dig
trenches. 
- paul
So, is anyone from cat.com on the list? I'm sure they'd be happy to
know that three people independently referenced _the exact same page_
to illustrate this scourge of our existence...
Cheers,
-- jra