I found a beetle in my garden this evening. It is not any any website nor are there any pictures of it. It is black about 1 3/8 long with two sections. There is white along the wing edges only, the rest of the beetel is black. I want to know what it is and is it harmful. I have lived in Arizona for over 50 years and never seen this beetle. Who can I ask or how can I find out what it is?