76 LYMANTRIA GRANDIS. 
this last generation as to the dates of appearance of the other 
stages of the metamorphosis, larve collected on 23rd March 
changing into the pupal stage on the 30th and 31st (as did the 
Dasychira sp.) and imagos issuing on the roth, tith, and 12th 
April. 
In September of the following year specimens of the larva 
pupa, and moth were sent from Jalpaiguri and identified as Z. 
grandis. 
The specimens of the other species of Lymantria (above 
described) sent to me during the same year from Jalpaiguri 
pupated in October, the first moths appearing only on the 
13th of the month, this corresponding with the 1st generation 
in Assam. It would therefore seem certain that either Z, 
grandis appears earlier at work in the forests than its four 
companions, or that its larval life is sherter. Its life history 
between June and August requires study, as also the length of 
time spent in the various stages of its metamorphosis in the 
different generations. The larve are said to be possessed of 
great vitality and are not so parasitised as the Dasychira sp. 
Localities from which reported. 
Both the Golaghat Division in Assam and the Jalpaiguri 
Division in Bengal report this insect from their sal forests. 
Hampson gives the known habitat of the pest as Ceylon. 
Relations to the Forest. 
L. grandis commits the same havoc in the sdl forests as its 
confréres above described. This defoliation on a large scale of 
the Duars and Assam sl forests has been known for some years 
and numerous insects in various stages of decay have been sent . 
for identification as causing the damage. Correspondence on 
the subject has in consequence become much confused and the 
identifications, in many cases often only partially attempted, very 
unreliable. It would be of the greatest service if, when the 
next attacks appear in Bengal and Assam on a large scale, the 
various stages of the insect are carefully watched and copious 
notes made whilst they are in progress in the forest. The 
different kinds of larve appearing to be concerned in the 
defoliation should be kept in separate boxes and the moths bred 
