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Dytiscus Harminieri, a genus of predatory, diving beetles that usually live in wetlands and ponds.

Great Diving Beetle

Dytiscus Harminieri, a genus of predatory, diving beetles that usually live in wetlands and ponds.

Dytiscus Harminieri, a genus of predatory, diving beetles that usually live in wetlands and ponds.

Great Diving Beetle

Dytiscus Harminieri, a genus of predatory, diving beetles that usually live in wetlands and ponds.

The pupa of the Dytiscus genus.

Great Diving Beetle

The pupa of the Dytiscus genus.

"A, Dytiscus Marginalis, or great Water-beetle; B, larva." — Chambers' Encyclopedia, 1875

Great Diving Beetle

"A, Dytiscus Marginalis, or great Water-beetle; B, larva." — Chambers' Encyclopedia, 1875

Portion of a muscle fiber of Dytiscus, showing network very plainly. One of the transverse networks is split off, and some of the longitudinal bars are shown broken off.

Muscle Fiber Showing Network

Portion of a muscle fiber of Dytiscus, showing network very plainly. One of the transverse networks…