SOME OBSERVATIONS ON THE GLOWWORM. spl 
several days, and whose exact locality I knew; however, a 
pocket electric light revealed them surrounded by often six or 
more males. The latter shone faintly every now and again, 
especially when handled. I then put ovt the lights of the house, 
and placed on the lawn a red light (photographer’s dark-room 
lantern), a blue light (a candle in a box behind a sheet of blue 
glass, such as is generally used in laboratories and museums), 
and an unprotected candle. The males were attracted in dozens 
by the red light in whatever position I placed it, but ignored the 
blue light and white light of the candle. On relighting the gas 
the diffuse yellowish light at the sitting-room window (blinds 
cream-coloured) became second favourite to the red lamp on 
the lawn. 
The following night there was still a considerable number of 
males about, but in a few days they had all disappeared, except 
a few which might be found creeping about the females in the 
field. My nearest neighbour across the field on the west told me 
he had been bothered for several nights by dozens of flying 
beetles coming into his house. I counted over one hundred and 
twenty females in the course of a single evening in the field to 
the west of the Station. Yet in the field to the east of the 
Station, Glowworms were very scarce, three or four at most; 
this may be due to the presence of hens, or that it is rather 
further from the Point, which seems to be a wintering ground 
for the larve. 
The following summer (1909) I prepared for the appearance 
of the male Glowworms, and tried them with the red light of a 
bicycle-lamp ; white light of a bicycle-lamp; green light of a 
bicycle-lamp ; blue light of laboratory blue glass; diffuse yellowish 
white light at window; fluorescent lights got by using screens of 
(1) fluorescein solution, and (2) 10 per cent. solution of sulphate 
of quinine. 
On June 28rd Dr. Malcolm Laurie joined me, and showed 
Finsen rays. The lights were thrown through paper cones 
(rather like the horn of a gramophone), which made landing- 
stages in which insects could be easily detected on arrival, and 
which only received those coming direct to the light. I dis- 
carded these cones, after one trial, as too cumbersome and too 
easily displaced by the slightest breath of wind. Dr. Laurie 
