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Collix Guenée
Type species: hypospilata Guenée, Sri Lanka.
Collix species are easily recognised by the wing facies. The forewing discal
spot is black, enlarged, consisting of elevated scales. The wings are shades of
black or brown, with numerous fasciae that are more or less parallel to the wing
margins. The underside has the discal spot, postmedial and submarginal fasciae
picked out darker on a uniform brownish grey ground. The forewing is narrower
than in Scotocyma Turner or Eccymatoge Prout, resembling that in Pseudocollix
Warren and some Horisme Hübner, where the discal spot of the
forewing is not enlarged.
The male antennae are filiform, slightly swollen or laminate. There are
pairs of coremata between the sixth and seventh and seventh and eighth abdominal
segments, the former often very large. The sixth sternite has a central apodeme
of variable length, often long; the sclerites of the seventh and eight segments
are reduced and this portion of the abdomen is predominantly membranous. In
the genitalia the uncus is slender. The valves are simple, with ornamentation
tending to be located along the costal margin, though the inner lamina is often
setose or pleated. The aedeagus vesica usually contains a single, rather short
cornutus.
In the female the ductus bursae is narrow, sometimes sclerotised. The
bursa has a longitudinal band or ellipse of laterally directed spines in the
distal broader part.
The genus is recorded from most of the Old World tropics, ranging to as
far east as Fiji where there are several endemic species (Robinson, 1975). There
are eight species in Borneo.
Nielsen, Edwards & Rangsi (1996) placed Collix in the
Eupitheciini, and the male genitalia have labides and ventral transtillar
processes characteristic of the group, though the latter are weak.
Singh (1953) described the chaetotaxy of a Collix larva. A
further larval description may be found for C. ghosha Walker in the text
following.
Host-plants recorded for the genus (reference above; Yunus & Ho,
1980) are in the genera Allophylus (Sapindaceae), Ardisia and Embelia
(Myrsinaceae), and Trigonostemon (Euphorbiaceae).
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