AND HABITs OF CLERUS FORMICARIUS, LINN. 126 
larva and imago, or of the time embraced in the pupal stage. 
In October 1897, on dissecting some pieces of thick bark from 
a full-grown pine-tree, I found larve of Clerus formicarius. 
I placed these pieces of bark under a bell-jar in an unheated 
room at the Royal Botanic Garden, and allowed them to remain 
until April 1898, when they were removed to a window in 
the Laboratory. I obtained imago-issue on the following 
dates ::— 
Two on June 29, 1898. 
One ) ) 39, ) 
») ”) July 12, ” 
” »> ») ai, ”? 
On July 14, 1898, a piece of newly-felled pine-stem was 
placed in a cotton sack and four of the /erus imagos intro- 
duced along with a number of live Ay/esinus palliatus. The 
sack was allowed to stand out exposed to all weathers. At 
intervals up to September 30 I made examination and found 
the Cleride alive, and now and again I added fresh Hy/esinus. 
On examination the C/erus beetles would either be found in 
hiding, lying close, under a piece of loose bark ora bark-scale, 
or else running over the log with their characteristic active 
and eager movement. 
On January 3, 1899, I removed the log from its sack, but 
could find no trace of my Clerus beetles. Trusting that they 
were in winter quarters concealed in the bark crevices, I 
returned the log to the sack. On opening the sack again on 
February 25th I noticed a Crus running about. The beetles 
continued to live till the end of May 1899. On June 3rd, eleven 
months from their appearance as imagos, I found three of the 
four lying dead ; the fourth had probably escaped by a hole in 
the bottom of the sack where the pine-log had worn the cotton 
through. These four Clerus beetles had appeared, after 
pupation, in June and July 1898. 
In July 1899 I bred out another C/erus imago, under the 
following interesting circumstances. On August 24, 1898, I 
removed two Clerus larve from below the bark of a pine where 
they had been since April 15, when the piece of pine came 
into my possession. One of the two larve was placed in a 
