This is a male mason bee (Osmia lignaria) making his first appearance into the world. He chewed an opening in his cocoon - the nipple end of the cocoon - and made his way out. Notice the long antennae and the white mustache, quite a way to attract the ladies.
Field notes: Male Mason Bee Emerging
Date: April 9, 2009
Updated: June 2, 2010
Place: Washougal, WA