A diagram of the <a href="https://en.wikipedia.org/wiki/stylostome" class="extiw" title="en:stylostome">stylostome</a>, or the hardened tube of dead cells formed by chiggers (Larval form of the <a href="https://en.wikipedia.org/wiki/Trombiculidae" class="extiw" title="en:Trombiculidae">trombiculidae</a>) when feeding on them.
<a href="//commons.wikimedia.org/wiki/User:Bugboy52.40" title="User:Bugboy52.40">Bugboy52.40</a>
<span class="int-own-work" lang="en">Own work</span>