|
Delgamma Moore
Type
species: calorifica Walker
(= pangonia
Guenée),
Bangladesh, India, Sri Lanka.
This
genus was revised by Zilli (2000a), who described a new species, flaviae
Zilli,
that ranges from the N.E. Himalaya to Peninsular Malaysia, but is not so far
known from the rest of Sundaland.
The male
antennae are finely ciliate, and in D. lilacea
Bethune-Baker
(New Guinea) are greatly swollen over the central part. The legs are in places
tufted in males. The facies of all species is of various shades of brown, but
always with more or
less straight postmedial fasciae on both fore- and hindwings consisting of a
fine double dark line with a pale centre. Distal to this the wing is a paler
shade than just basal to it, but grades darker towards the margin. The
submarginal may define or enclose darker brown markings within this marginal
zone, which is often suffused with pale mauve; these dark brown markings are
particularly well developed in the type species, with a large one on the
forewing costa, but absent from flaviae.
The
hindwing margin, when angled, is obtusely so at CuA2. The type species shows
strong sexual dimorphism, males having an elongate, elliptical, scaleless zone
in the medial section of the hindwing (M1 and M2 are bowed away from each other
to enclose it) that probably covers an elongate band of androconia over the
dorsal margin of the forewing underside when the insect is at rest (described in
more detail by Zilli (2000a)). The male hindwings are reduced in area relative
to those of the female.
The male
abdomen has the eighth segment only slightly modified. The sternite is
posteriorly very shallowly notched to render it slightly bilobed, whereas the
tergite is rounded posteriorly and shallowly notched anteriorly. The genitalia
have the uncus apically hooked, and a scaphium is present. The valves are
narrow, simple, but with a prominent process arising from the base of the costa,
curved or hooked in opposition to the valve. The juxta is a broad X-shape and
probably a modification of the inverted ‘V’ type. The aedeagus vesica is
complex with a few broad lobes and extensive scobination.
The
female genitalia have the ostium between the eighth and seventh segments, the
sternite of the latter somewhat reduced relative to the tergite, and distally
bilobed in the type species. The ductus bursae is short and at least partially
sclerotised. The corpus bursae is irregularly elongate, pyriform.
The
biology of the type species is described below.
<<Back
>>Forward <<Return to Content Page
|
