View Image Gallery of Family Lasiocampidae

Bhima Moore

Type species: undulosa Walker
This genus was reviewed by Lajonquière (1975) who recognised four largely allopatric species in mainland Asia that did not extend south of the Himalayan region and northern Vietnam. Grunberg (1923) included the Sunda Islands in his distribution for undulosa but this may refer to the species described here, representing a major disjunction from the rest of the generic range.

The forewings of all species are fasciated (double post- and antemedials) with pale lines on dark blackish brown or brown, and are often somewhat translucent. Females are larger than males, with deeper wings and less translucence. The venation is unusual in that R4 is associated with the R2+3 system rather than with R5 + M1 (Figure 2).

The male antennae are bipectinate, distinctly more broadly so over the basal quarter. In the female pectinations are narrower and more even.

The male genitalia have a well developed cubile, reduced, unequally bifid valves, a pair of setose socii from the tegumen, and a short, flexed aedeagus with a group of terminal spines; the vesica is unornamented.

The larva of undulosa was described by Gardner (1941). The prothorax has two strong lateral protruberances on each side, the lower one the longer. There are distinct lateral protruberances on the body segments, being diffuse tufts of fine and hastate/spatulate setae, those of the thorax black. The mesothorax and metathorax have small transverse groups of moderately black setae, together with pale hastate setae. The upper surface is partly nude, but abdominal terga have pale setae in two or three transverse tufts on each segment. There are no distinct dorsal verrucae. The head is blackish with pale marks, the body skin black, variegated paler; the hair is predominantly olive green. The host in India was Quercus (Fagaceae).

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