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Nemoria bistriaria Hubner, 1818. [7046]
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| Nemoria bistriaria,
green summer form |
Nemoria bistriaria,
brown spring form |
| Nemoria bistriaria is perhaps the most widespread Nemoria
species in the east, found in eastern forests from Mississipi to Quebec
and as far west as Illinois, Missouri and Texas. It is distinctive in
its abdominal markings, the presence of a red terminal line on the wings
with checkered pink fringe, and the presence of a small white band on
the front of a rust red foretibia. The white am and pm lines vary in
strength and clarity among specimens, and in some specimens the am line
is very faint. In general, the lines are fairly thin compared to some of
the Western species of the genus. Nemoria bistriaria is
occasionally confused with Nemoria lixaria, which overlaps a
large portion of its southern range. Nemoria lixaria never occurs
in a brown form, and often has brighter, stronger red markings on the
wing margins.
Nemoria bistriaria occurs in a seasonal brown form where the
green color of the wings is entirely replaced by a light coffee color.
In some areas, the brown form appears to represent the majority or the
entirety of the first brood of adults to eclose.
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