194 The Use of the Antennæ in Insects. [April, 
some other thing. But it was noticeable that before resting, the 
insect acted exactly the same as uninjured individuals out-of- 
doors, by moving its wings, poising itself for a moment in the air 
in front of the object on which it had chosen to rest. A proof. 
that the insect was perfectly blind and could not see is the fact 
that none of those which had their eyes covered with Indian ink 
were observed to fly to the single window giving light to the 
room where the experiments were made; if they had seen but 
slightly, they would have flown to the light, as all insects do in 
similar cases. 
3. With one of these insects deprived of light I made, with a 
pair of scissors, and close to the head, a section of both antennæ. 
This insect when thrown up fell heavily down, sometimes not 
opening its wings at all, and was entirely unable to direct its 
flight. 
4. I made another butterfly blind, and removed the antenne, 
as in Experiment 3, and placed it at liberty upon a table, allow- 
ing it to rest a few minutes. I prepared a solution of sugar and 
‘water, and with a small brash I took up a drop of the sweet liq- 
uid, and then slowly and carefully I moved the brush very near 
the mouth, the head, and the spiracles, in fact all around the 
body. The poor blind butterfly remained perfectly still ; no em- 
anations whatever seemed to reach it from so sweet a substance. 
Then, guided by induction, I touched the stumps of the cut an- 
tenn ; no sooner was this done than it received the impression, 
unrolled its proboscis, and with great activity searched for the 
sweet object, in order to realize the impression it had received. 
For two or three minutes it was actively employed in the search, 
when I put before it a drop of the sweet beverage which it soon 
found and drank. : 
5. Taking another butterfly, prepared like the above, I placed 
on each stump of the antennz a very small drop of thick gum 
arabic, and waited until it dried. This insect, thus prepared, 
when thrown up seemed to be without sensation, falling down 
like a stone, without any motion of the wings. As with the pre- 
ceding butterfly, I placed it upon a table, and held the brush 
with the drop of sugar-water and let it touch the sealed antennal 
stump, but no impression was received. I also pressed the brash 
on the proboscis, but it was not until I had pressed so hard as to 
wet it through that it felt the impression and unrolled its tongue 
The following summer I made some fresh experiments pees 
this interesting subject. Of all the Lepidoptera with whic 
