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Negritothripa Inoue
Type
species:
hampsoni Wileman, Japan.
The genus
contains some of the smallest species in the subfamily. The venation is of the groundplan type. The forewing facies is a marbled mauvish grey, sometimes with
much paler patches along the dorsum. The reniform is large, the border a fine
dark ring, and there is a dot of raised scales approximately centrally, and a
small raised patch immediately more basally on the antemedial. The postmedial
surrounds the reniform somewhat squarely, before flexing back to the dorsum.
The male abdomen has slight, acute and divergent apodemes on the eighth tergite.
The uncus is lost, but the scaphial tube is finely setose. The valve is divided
into a dorsal spine and a ventral, narrowly paddle-shaped portion. The saccus is
shallow, weak, but the associated intersegmental membrane bears long hair-like
setae or scales.
In
the female, the ovipositor lobes are rather rectangular, relatively densely setose. The ductus and bursa neck are long and narrow. The corpus bursae is
pyriform, generally finely scobinate. The paired bands are united into a
rasp-like structure that tapers into an acute tail, and set basally in the bursa
opposite a much smaller, heart-shaped sclerotisation.
The larva of the type species was illustrated by Sugi (1987). It is bright green
with a coarse, bluish, segmentally defined lattice over the dorsal half, with
the primary setae long, prominently black and slightly clubbed apically, some
set on small tubercles. These setae are used to produce stridulatory ridges in
the cocoon, the exterior of which incorporates particles of bark. The host-plant
is Quercus (Fagaceae).
The genus consists of the type species,
N.
orbifera
Hampson comb. n. (Himalaya, S. China, Burma) and the three species
described below.
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