+ Proceedings of the Royal Physical Society. 
condition, pounced upon it and devoured it. The remaining sods were left 
undisturbed, it being practically certain that each now held an adult Tiger- 
beetle, or a pupa about to become one. 
PARALLEL OBSERVATIONS IN THE OPEN, 
On 3rd September 1918, a short visit to Argyllshire was made. Of the 
sixteen burrows that had been marked in July, four were found closed up for 
hibernation. Two of these were opened for examination, and the larve were 
discovered at the bottom. When taken out the grubs showed themselves 
quite active, and readily made new burrows for themselves, closing the 
entrance as before. The sixteen burrows were re-marked in order that they 
might be found again in the following spring." 
On 27th April 1914, Argyllshire was again visited. The larval burrows 
had been re-opened, and some of those marked in autumn were found again, 
and their inmates accepted a meal of meat, though blue-bottles and green- - 
bottles were about, and a species of Libio was very numerous. Four of these 
burrows were removed to Edinburgh, where one was closed by the larva for 
pupation on 2nd May, one on 3rd May, and the other two two or three days 
later. On 9th August 1914, I opened three of these burrows, and in each 
case a beetle was found. These three beetles and the beetle of the original 
stock obtained on 28th July were put into a breeding-cage, placed out of doors 
in a sunny situation. 
On 25th August 1914, another short visit to Argyllshire was made. Four 
of the marked burrows were found, and were now all closed. They were 
opened for examination, and in each was found a beetle head upwards in the 
burrow. All the beetles when first exposed were semi-torpid, and remained 
so for some little time, only moving when touched. Two of them were 
placed at once, without being roused, in small specimen tubes plugged lightly 
with cotton wool and kept in darkness, to ascertain if possibly the beetles 
might thus pass the winter. They remained alive for some weeks, moving 
shghtly if touched. Eventually, however, they died, probably from lack of 
moisture. The two other beetles were placed in the breeding-cage beside the 
four already mentioned. 
The cage measures a cubic yard, and is roofed half by glass and half by 
zinc gauze, which admits the entrance of sufficient rain for that season of the 
year. The east and west sides being of zinc gauze permit constant ventila- 
tion, while the sides to the north and south are of glass. The north side is 
1 Tt will be noted that, compared with the larve being kept at Edinburgh, these in the — 
West were later in closing their burrows for hibernation. 
