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Mythimna (Leucania)
roseilinea Walker
Leucania roseilinea Walker, 1862, J. Linn. Soc. Lond. (Zool) 6:179.
Leucania
aspersa Snellen, 1880, Tijdschr. Ent., 23: 42, syn. n.
Leucania
homopterana Swinhoe, 1890, Trans. ent. Soc. Lond., 1890: 219.
Diagnosis. See
M. loreyi and M. venalba above. This is the smallest of the
three species. The male genitalia provide the best diagnosis.
Taxonomic
notes. The
taxon compta Moore may also be synonymous or the mainland Asian
sister-species but the type has not been examined (its current synonym stramen
Hampson from S. India has a slightly smaller cucullus than roseilinea and
shorter dorsal sclerotised zone to the sacculus); aspersa types were
examined by W.W. Brandt, but the synonymy was not published by him. M.
pauliana Rungs is similar species flying in Madagascar, and M. linearis Lucas
is also related and ranges from Sulawesi to Australia. M. linearis has a
much more elongated, narrow, sclerotised dorsal margin to the sacculus. Taxa in
this group have a spine on a sclerotised band at the apex of the aedeagus.
Geographical
range. Burma, Sundaland and Philippines to New Guinea.
Habitat
preference. The species in not uncommon in disturbed, open and cultivated
habitats in the lowlands.
Biology.
The larva has been noted feeding on rice (Oryza) in Java (CIE
records).
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