<p class="question">Are the antennae 4-segmented, with the third segment often enlarged?</p>
 
<p><a href="http://parkcitizenscience.org/dragonfly/diagrams/diagram_images/anisop2a1.jpg" rel="lightbox" title=""><img src="http://parkcitizenscience.org/dragonfly/diagrams/diagram_images/anisop2a1_thumb.jpg" alt="" border="0"></a></p>

<p class="question">Are the antennae 6- and 7-segmented?</p>

<p><a href="http://parkcitizenscience.org/dragonfly/diagrams/diagram_images/anisop2a3.jpg" rel="lightbox" title=""><img src="http://parkcitizenscience.org/dragonfly/diagrams/diagram_images/anisop2a3_thumb.jpg" alt="" border="0"></a></p>
