thoracica Moore comb. n., stat. rev.
thoracica Moore, 1884, Lep. Ceylon, 3: 31.
ceres Butler, 1886, Trans. ent. Soc. Lond., 1886: 394.
euthusa Hampson, 1891, Illustr. typ. specimens Lepid. Het. Colln Br. Mus., 8:
heliarcha Meyrick, 1897, Trans. ent. Soc. Lond., 1897: 370.
unipunctata Bethune-Baker, 1906, Novit. zool., 13: 201.
nonagrica Walker auctorum (Zimmerman, 1958; Robinson, 1975; Holloway, 1979).
This and the
next species are very similar. Both have males distinctive within Athetis in
having a large basal area of the forewing buff, contrasting with the grey of the
rest of the wing. The hindwings are at least partially slightly nacreous, with
the veins picked out darker, a feature absent from other Bornean Athetis. The
two species are distinguished from each other in the diagnosis of the
and Pacific tropics.
species is frequent in open habitats, particularly in the lowlands. Confusion
with the next species has prevented a clear picture of any habitat segregation
between the two.
history was described in great detail by Zimmerman (1958; after Swezey). The egg
is hemispherical with 30 meridional ribs and faint crossridges. It is green with
a red patch at the apex and a ring of the same colour one third from apex to
first instar larvae are blackish with prominent setae; they move in 'semi-Looper'
fashion. The second instar is mottled reddish green.
instars are mottled greenish and blackish with some red, and with subdorsal
white lines. A8 is humped and has two white spots dorsally as has A2. Instars
become progressively darker and more variegated with black brown, olive green,
yellow and white.
is in the soil.
recorded (Zimmerman; Robinson, 1975; CIE records) are: Commelina
Ipomoea (Convolvulaceae); Syzygium (Myrtaceae); Portulaca (Portulacaceae);
Nicotiana (Solanaceae); Camellia (Theaceae) and unspecified
Gramineae and Leguminosae.
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