>>23334118Butterflies and moths belong to the same order, Lepidoptera.
All larvae of moths and butterflies are called "caterpillars".
Venonat, despite its name, is pretty obviously not a gnat. A gnat has wings, and does not have pincers. Venonat is closer to a wooly caterpillar in that regard.
Caterpillars get pretty abstract.
http://en.wikipedia.org/wiki/Saddleback_caterpillar