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Herochroma
flavibasalis Warren comb. n.
Actenochroma flavibasalis Warren
1894, Novit. zool., 1: 381.
Neobalbis bipunctata Thierry-Mieg,
1915, Miscnea. ent., 22: 47.
Neobalbis flavibasalis Warren;
Holloway, 1976: 59.
Diagnosis. This and the next species have more rounded hindwings and a greyer
green, more speckled facies than the species already discussed. The discal spots
above are dashes rather than dots. On the underside the bases of the wings are
yellow, the distal black bands broad and the discal spot is strong on the
forewing, vestigial on the hindwing, rather than present on both wings. The two
species are distinguished from each other in the diagnosis of the next species.
Taxonomic notes. Male genitalia differences between taxa in the flavibasalis group
are very slight, even where sympatry occurs as in Java and Borneo. The Bornean
differences are presented below. In Java the taxon H. hemiticheres Prout
comb. n. & stat. n. must be treated as a full species distinct
from flavibasalis (type locality also Java), having a shorter, upturned
apex and costal process to the valve, the basal process being broader with much
less basal curvature. The quadrate apex of the gnathus is much shallower, more
broadly based. For this reason the mainland Asian subspecies described for flavibasalis
are probably also best treated as distinct: H. thaiensis Inoue comb.
n. & stat. n. (Thailand); H. mansfieldi Prout comb. n. & stat. n. (Yunnan).
The relationship of mansfieldi to thaiensis needs to be
investigated.
Geographical range. Sundaland.
Habitat preference. During the Mulu survey the species was rare in
lowland forest, showing some preference for kerangas (heath) forest. It was more
frequent in lower montane forest. A single specimen was taken at 1200m on G.
Kinabalu.
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