An Eastern Tailed Blue <i><a href="//commons.wikimedia.org/wiki/Cupido_comyntas" title="Cupido comyntas">Cupido comyntas</a></i>.  It had a pretty blue on the insides of its wings, but I totally failed to take a picture of it, no matter how I tried.
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/44545509@N00">Benny Mazur</a>
CC BY 2.0
originally posted to <b><a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a></b> as <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/44545509@N00/1271453708">Eastern Tailed Blue</a>