1899-im] Dr R Stewart MacDougall on Genus Pissod&s. 333 
Table of Escape Months of Pissodes notatus under natural 
conditions , as recorded in the series of Experiments . 
Year. 
Month. 
Remarks. 
1896 
Last week of July 
From eggs laid in same year. 
33 
August 
33 33 33 
33 
September 
33 33 33 
33 
October 
33 33 33 
33 
November 
33 33 33 
These beetles were from eggs laid 
in 1896. They had reached 
1897 
April 
the imago stage before the 
33 
May 
entry of winter 1896-97, but 
they remained in their beds 
till April and May. 
3 3 
June 
From eggs laid in 1896. Winter 
passed in beds as full-fed 
larvae. 
33 
July 
From eggs laid in 1896. 
33 
August 
From eggs laid in 1897. 
33 
September 
33 33 33 
33 
October 
33 *3 3 3 
33 
November 
33 33 33 
1898 
April 
33 33 33 
33 
July 
33 33 33 
33 
August 
33 33 33 
33 
September 
From eggs laid in 1898. 
33 
October 
33 33 33 
I also found, towards the end of March both in 1896 and 1897, 
beetles feeding on my pines. These were beetles from among 
those which had issued in the previous summers or autumns, and 
had early come out of their winter quarters to feed again. Save 
December, January and February, there is no month of the year 
in which I have not found feeding beetles. No longer then can 
the preparation of catch-trees or decoy stems be limited to so- 
called swarm periods, but must be attended to from March onwards 
throughout the year. 
While in view of this egg-laying from April to September, and 
the consequent succession of imagos (a succession which, save for 
