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The following key utilizes features of adult structure. The differences
in external structure between some of the species are rather subtle
(e.g. between B. balli and B. foveum). For these, an examination of
the male genitalia is sometimes necessary for accurate identification.
A page Click on an image to view larger version & data in a new window
comparing male genitalia may
be of use while examining genitalia.
(There is an alternative key with all couplets
on one page.)
1. Distinct smooth patches ("mirrors") on elytra, at least on
interval 3 surrounding silver spots, or elytra generally
smooth and shiny ............................................3
Click on an image to view larger version & data in a new window
1'. Distinct elytral mirrors lacking, interval 3 between silver
spots dull, or at least not markedly shinier than rest of
elytra ......................................................2
Click on an image to view larger version & data in a new window
About This Page
David R. Maddison
Oregon State University
Page copyright © 1995 David R. Maddison
Page: Tree of Life
Key to Adults of Bembidion (Bracteon)
Authored by
David R. Maddison.
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