Two grubs of the species Cacyreus marshalli in the tunnel they dig in a geranium stem.
Please note the severe damage they made to the victim plant
<a href="//commons.wikimedia.org/wiki/User:RobertoMM" title="User:RobertoMM">RobertoMM</a>
2009-08-12
<span class="int-own-work" lang="en">Own work</span>