Maple tree

[machuca86]

Maple tree with large oval shaped holes. Here is a picture of the holes and you can actually see a long antenna of one sticking out of the hole. Also looked like it had some big pinchers

 

[cerviarborist]

Mallodon dasystomus (Hardwood Stump Borer) is my guess.
http://bugguide.net/node/view/4257/bgimage

 

[machuca86]

I only saw the head pop out for a second but that's what it looked like. Whats the best treatment that wont harm the tree

 

[cerviarborist]

I believe they're pretty much saprophytic. It appears they're only in the dead wood, and the tree seems to be developing wound wood around that area. It doesn't appear that live portions of the tree are being affected, at least from your photos. You can take some soapy water in a squeeze bottle, squirt it into the openings, and that will drive the borers to the front of the hole, where you can grab them with forceps. Once you've caught one or two, take them to your extension for positive ID, and they can tell you whether you even need to do anything about them.

 

[machuca86]

Heres the beetle