When is a Caterpillar not a Caterpillar? (400th Post)

The Cutworm
The Sawfly Larvae

When it’s a Sawfly.

Did you know that there is a primitive group of the hymenoptera  with free-living larvae that look very much like the caterpillars of the lepidoptera?  Known as the  Sawfly, there are morphological distinctions between them and the caterpillars and they can also be distinguished by this defensive posture adapted by the Sawfly larvae (Arge sp.) pictured here.