Family: Chrysomelidae

Reed Beetle

There is one common Chrysomelidae genus in Minnesota waters: Donacia. Donacia looks like a Lepidoptera caterpillar, but it does not have prolegs with crochet hooks (click to compare with Lepidoptera). The Donacia body is unsclerotized and obese, with 3 pairs of segmented legs on the thorax. The main identifying character is the two large sclerotized hooks on the ventral side of the end of the abdomen.


Donacia hooks Donacia ventral

Coleoptera Larvae

Reed Beetle

Predaceous Diving Beetle

Coleoptera Elmidae LarvaeElmidae
Riffle Beetles

Gyrinidae larvaGyrinidae
Whirligig Beetles

Haliplid larvaHaliplidae
Crawling Water Beetles

Hydrophilidae larvaHydrophilidae
Water Scavenger Beetles