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Funded in part by award DEB0447694 from the National Science Foundation to M. Caterino.

Last updated 01/16/2009

  California Beetle Project > Species Pages > Narpus angustus


Scientific name: Narpus angustus Casey
    Order Coleoptera
    Superfamily Byrrhoidea
    Family Elmidae

Images (click to enlarge)

What it looks like: 3-4 mm in length. Its body is dark brown with striae, or shallow punctures, running the length of its elytra. The rows of striae alternate with rows of light brown, short hairs.

Where you'll find it: This beetle is found throughout the coastal California mountain ranges, in large, clear, rapid streams.

Natural History: These beetles are abundant where bars of coarse gravel drop off into deep pools. Both the adults and the larvae are aquatic.

This page was written by Maren Farnum, a 2005 California Beetle Project intern.

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