PREFACE. 
eee object of issuing the Departmental Notes on 
Insects that affect forestry in India in their present 
form is to enable the Officers of the Department and others 
interested in the culture of trees to keep up to date with 
our knowledge of the subject and to assist the advance- 
ment of the work by studying the still unknown portions of 
the life histories of th2 various pests detailed and of 
others still unrecorded. To this end, criticism and dis- 
cussion are cordially invited. 
Several of the insects dealt with are new to science, 
and most of the information on their habits,’etc., is new. 
It has not been considered necessary here, however, to 
give in full detail the reasons for the statements made 
with reference to some of the new and more complex of ' 
the life histories. The author hopes to publish elsewhere 
full and detailed technical papers dealing with the matter 
from the scientific standpoint. 
It is proposed to give information in these notes upon— 
1,— Hurtful Insects. 
ii.—Useful Insects. 
Owing to queries having been received on the sub- 
ject it should perhaps be pointed out that the descrip- 
tions of the insects do not aim at being scientific ones, 
they having been drawn up merely as simple aids to 
identifying the insects by fellow-workers in the field. 
[t is hoped that the new species will be described with the 
help of scientific confréres. The writer hopes in time 
_to deal himself with the Scolytéde and Platypode of 
which already considerable collections of unknown species 
have been made. 
Hats olEBBING, 
DEHRA DUN; 
The 25th October rgoz. 
