The Saroba group of genera
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Tamba Walker

Type species: submicacea Walker.

Obdora Walker (type species nigrilinea Walker, India).

This is a large but morphologically uniform genus of rather delicate moths with distinctively patterned wings, the hindwings usually having most elements of the forewing pattern. The ground colour of the wings is usually pale fawn or greyish, and the forewing postmedial is usually angled or curved round the discal area, though its more posterior oblique section may be continued by one of its components towards the apex. The male antennae are ciliate, and the legs are often tufted with scale crests and hair pencils (e.g. particularly T. lahera Swinhoe). The labial palps are typically catocaline.

The male abdomen has a pair of hair pencils (occasionally coremata, e.g. in
cautiperas Hampson comb. n.) on the eighth sternite that are often strongly developed, and there is usually a third, smaller one anterior to them centrally. They are relatively weakly framed by sclerotisation of the margins of the sternite, though it does have lateral rods. The tergite has splayed apodemes from which it expands distally into a rounded pocket. The condition of both sclerites is probably a modification of the framed corematous condition. The genitalia are rather elongate. The uncus has a concavity dorsally that gives rise to a hair tuft. The vinculum is much longer than the tegumen, and the latter usually has a rugose or setose expansion or lobe centrally on each side. The junction of tegumen and vinculum is usually through a small intercalary sclerite (e.g. Fig 745). The valves have their distal part reduced to a small lobe (perhaps equivalent to the more tongue-like structure in the Saroba complex of genera), with two or three processes extending from the base of the costa to the apex of the sacculus (which makes up most of the length of the valve). The juxta is a rather short, broad plate, but there is often a sheath-like dorsal extension to the anellus that is scobinate throughout or at its apex. The aedeagus is long, the vesica tubular, broader basally, sometimes with small diverticula.

The female genitalia have the ostium set well within the eighth segment, providing a rather trumpet-like opening to the ductus, which is narrower, simply sclerotised over most of its length to a point where it kinks slightly and gives rise to the ductus seminalis just before it opens into the corpus bursae. This is pyriform, but rather elongate and narrow, with a partial ring of small, distally directed spines closely subbasally. The intersegmental membrane adjoining and anterior to the ostium and eighth segment is usually extensively finely scobinate and may form pockets on each side.

S.J. Willott (unpublished data) recorded several species of
Tamba almost entirely from the understorey of lowland forest in the area of the Danum Valley Field Centre in Sabah. Chey (1994) recorded many species in low numbers in softwood plantations in the lowlands of Sabah.

et al. (2001) recorded various species from Aporusa (Euphorbiaceae), Barringtonia (Lecythidaceae), Sandoricum (Meliaceae) and Symphorema (Verbenaceae).

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