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Parasthena Warren Gen. rev.
Type species: flexilinea Warren.
This genus is brought out of synonymy with Hydrelia Hübner (type
species sylvata Denis & Schiffermüller, Europe) as it lacks some of
the more asthenine (sensu Pierce, 1914) characters of typical Hydrelia.
It has a typically asthenine pattern, on both fore- and hindwings: fine
multiple grey-brown fasciation on a pale grey-brown ground, with black discal
spots. The more marginal fasciae are sharper.
However, the male genitalia lack the projecting sacculus of the valve
indicated by Pierce to typify the Asthenini. The valves have long, basally
directed setation as seen in many eupitheciine genera, and in Eois Hübner
following. The uncus and subscaphium are also as in Eupitheciini, with moderate
labides also. The saccus is narrow, prominent. The eighth sternite has a pair of
apodemes on its basal margin, the tergite a single central one: the former are
seen also in Poecilasthena.
The female has a signum that Pierce would have considered typically asthenine, but without the additional general spining distally in the bursa seen
in typical Hydrelia and some other Palaearctic asthenines.
The genus consists of only two species.
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