25 
Part III. - ] Beeson: Beehole Borer of Teah. 
due chiefly to the exudation of oil from the body, which spreads to the 
wings. Butler’s [1886, p. 29] and Hampson’s [1892, p. 307] technical 
descriptions were apparently made from greasy specimens. The illus¬ 
tration of D. lignens, Butler in Ill. Het., vi, plate 108, fig. 3 is of an 
exceptionally dark individual with a prevalent pinkish-brown ground 
colour. Beelanan [1919, p. 9] gives a detailed description of Java 
specimens, which seem to be darker or browner than the Burma race. 
2. THE EGG. 
Unfertile eggs are sulphur-yellow cylinders with rounded ends, about 
c^th of an inch long, and are laid in strings or clusters of a hundred or 
more stuck together with a cement soluble in water. Beekman [1919, 
p. 10] describes the egg as follows :—Yellow or yellowish white, soft 
with a tough skin, non-transparent but slightly translucent, short cylin¬ 
drical, with rounded ends ± f mm. long, and about half as much in 
diameter,—but does not definitely state that they are fertile eggs. 
3. THE LAKVA. 
[Plate i, figs. 1—10; Plate iii, figs. 1,2]. 
General description. The caterpillar is rather robustly built, 
cylindrical, tapering slightly at both ends, smooth, shining, hairless 
except for scattered light brown hairs (the setae discussed in the techni¬ 
cal description). The head is prominent, reddish to chestnut brown 
in colour ; with black jaws, the thorax light brown, the hind portion 
with a rough surface formed by numerous backwardly directed teeth ; 
the body is marked with alternate transverse pink and white bands 
and prominent brown oval spots (spiracles) on each segment. The 
coloured illustrations on plate iii, figs, 1, 2 are sufficient to iden¬ 
tify the caterpillar and it also the only pink and white striped cater¬ 
pillar with a rough shield on the thorax, that is known to bore into 
teak. 
Length up to 2| inches. 
Mature Larva. 
[Plate 1, figs. 1—10]. 
Technical description.* Form , robust, cylindrical, slightly 
flattened ventrally, prothorax strongly declivous, thoracic and last 3 
abdominal segments tapering. 
Colour .—White : head reddish to chestnut brown with mandibles 
and condyles black, and labium pale testaceous, edged with chestnut; 
* Terminology according to Fracker, 1915. 
[ 253 ] 
