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Document Type

Research

Abstract

These predacious diving beetles constitute the largest family (Dytiscidae) of Coleoptera inhabiting water. They are often seen hanging head downward in the water with the tip of the abdomen exposed at the surface. The members of this family are rather oval and flattened in shape. The elytra are usually hard and shiny, often with many punctures. Some of the smaller species are pubescent. The bare filiform antennae are glabrous and have eleven segments. The hind legs are flattened and have five tarsal segments which are fringed with long hairs making them strongly adapted for swimming. The beetles are usually brownish black or olive black in color and sometimes the margin of the thorax and elytra are marked with yellow or more rarely red. Occasional species also have a design in these colors on their back.

Publication Date

1949

Journal Title

Proceedings of the Iowa Academy of Science

Volume

56

Issue

1

First Page

397

Last Page

398

Copyright

© Copyright 1949 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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