Can anyone identify this bug? Or help diagnose why the tree seems to be dying?

     I'm trying to help with my gf's mom with her property and specifically tree work right now,  so yay... im learning lol.  Anyway, the problem I'm having is with one of the eucalyptus trees.  It seems to be dying and I want to find a way to save the tree. 
     It may have something to do with this beetle i found in the tree.  There are TONS of them.  Considering there are a few eucalyptus trees on the property and this is the only one dying, and i think the only one with the beetles, it seems it seems they may be the cause.  So is it the beetle? Do they kill these trees? How do I get rid of them if I need to?

NOTE: There are 2 types of eucalyptus trees on the property.  I'd never seen the one with the round leaves before, but its definitely a eucalyptus.  In the pic i guesstimated on the varieties of eucalyptus.

Picture of Can anyone identify this bug?  Or help diagnose why the tree seems to be dying?
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finchmaker7 years ago
The insect is an Eucalyptus tortoise beetle.
http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn74104.html
That is a site that has all the information you need to attempt to get rid of this pest.
Good Luck! let me know how it works out.
brian3140 (author)  finchmaker7 years ago
Thanks! That's definitely the beetle, but unfortunately seems to not be the cause of my problem.  The beetle does feed on eucalyptus, but is non lethal.
     Perhaps I'll post a new question later with pics of my specific tree problem.
paganwonder7 years ago
How long do eucalyptus live?  Your tree may be dying of old age.