not sure what this is, Noticed this today on a japanese maple in Memphis, Tennessee. Not even sure what to categorize it as. An egg case? It’s about a 1/2 inch in diameter.
I found the site below which identified the object as the casing around wax scale. I actually found about a dozen, which ranged from 1/8 of an inch to a little over 1/4 inch.
Thanks for getting us an answer before we had a chance to do the research. We will also post a like to your site, www.wildlifetheater.com so you will get some additional traffic.