24 
Indian Forest Records. 
[Vol. VIII. 
PART II. 
Description of the stages of the insect. 
(Described from specimens collected in various localities in Burma, 1914—19.) 
1. THE MOTH. 
[Plate iii, fig. 4.] 
General description. Head. Pale grizzled brown ; antennae 
brownish, simple, threadlike in the female, bipectinate basally in the 
male. 
Thorax. Above and at the sides grayish to pure white, with a 
patch of black clubbed scales behind the insertion of the hind wings 
(meta-thorax), and sometimes with a black longitudinal line or band 
on the upper (dorsal) surface; underside with brownish-black hairs. 
Legs long and robust; tarsi with sharp bifid claws. 
Abdomen. Relatively long and heavy, pale brown, more or less 
suffused with black especially at the sides (excluding the last two 
segments) ; a black median longitudinal line ventrally and sometimes 
also dorsally, but more faintly marked ; male with a pair of black tufts 
at the end of the abdomen ; female with a telescopic. ovipositor. 
Wings. — Forewing , long, narrow, pale brown with white scaling 
and variable black-patterning ; the black colour occurs mainly as small 
transverse spots along the costa, longitudinal fines or streaks near the 
centre of the wing, and between the veins on the outer and lower borders 
in irregularly marbled patches ; near the outer angle is a fairly conspi¬ 
cuous white patch with faint dark markings, and margined with black, 
above and behind, but passing into the general marbling in front. Rind 
wing, shorter and broader, more or less triangular, fuscous, marbled 
with black and white spots. Underside of both wings with similar, 
less distinctly marked patterns and darker coloration. 
Length .—Female 40 to 80 mm.; male 40 to 60 mm. 
Wing span .—Female 80 to 160 mm. ; male 80 to 100 mm. [Beekman, 
1919, p]. 9). The average size of the Burma specimens is about 100 
mm.=4 inches. 
The ground colour and markings are very variable but there is a 
general cryptic resemblance to teak bark. Plate iii, fig. 4 shows 
a moth in a typical resting attitude on a teak tree. In living specimens 
the colour pattern is apparently composed of black and white scales 
only, but in dead or rubbed specimens a pale brown colour pervades, 
[ 252 ] 
