492 DUOMITUS LEUCONOTUS, Walker. 

the bark, and this hole will be observable on the outside owing 
to the fresh sawdust to be seen just below it on the bark of the 
tree. Having thus prepared an exit, the caterpillar backs 
down its tunnel for a distance of 2-3 inches (this space being 
kept quite free of wood particles) and spins stout web-like 
series of strands of a cearse yellowish-brown silk across and 
below the mouth, thus effectually preventing any intruder 
entering the tunnel from outside getting near it, The larva 
then pupates. These strands of coarse brown silk are very 
characterstic of the pupation of this Duomitus. The pupal 
stage is probably ashort one—at the most from six weeks to 
two months. Pups were found fully mature and also but newly 
changed from larve early in September, but they had ail issued 
by the end of the third week in the following month. The hole 
bored to the outside by the Jarva is more or less vertical, only 
inclining to the horizontal just near the bark, so that the pupa, 
when the moth is ready to emerge, creeps up the tunnel and 
projects from it at an angle at right angles to the stem of the 
tree. In doing this the pupa bends over at an angle, the 
upper half being almost horizontal, whilst the lower portion 
remains in the almost perpendicular tunnel (see fig. d). The 
pupal skin then splits down at its anterior end, both dorsally 
and ventrally as far as the posterior edge of the last thoracic’ 
segments, and the moth crawls out. Inthe cleavage the head 
and antennal covering come away as one piece. | 
Distribution. 
This insect was taken in Calcuttain 1903; Hampson gives 
the distribution as Simla, Sikhim, Calcutta, Ceylon. 
