Adult female <i>Phidippus mystaceus</i>. Full frame (roughly) at about 4:1 or so.
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/7539598@N04">Opo Terser</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/7539598@N04/3085178031">Adult Female Phidippus Mystaceus</a>