1877.] Experiments on the Sense- Organs of Insects. 421 
the floor, remaining there; on opening the window it flew out 
heavily, having evidently lost some of its powers of flight and of 
directing the movements of its wings. It remained just where it 
had settled in the path from four P. M. until after nine o’clock the 
next morning. ‘Then on putting it in a sunny place it disap- 
peared five minutes after, and must have become warmed and 
flown away. 
A Colias Philodice on removal of its antennz did not fly quite 
so readily as one in the same room unmutilated, but the differ- 
ence was not marked ; two deantennized Pieris rape behaved in 
the same manner as the Colias. 
An Argynnis Idalia in losing its antenne seemed but slightly 
affected, but showed more of a tendency to drop to the floor than 
if in a natural condition, On putting sweetened water on the 
ends of the stumps of the antennæ, in a minute it partly but not 
wholly unrolled its maxilla. On moistening the ends of the la- 
bial palpi no effect was produced ; on moistening the base and ends 
of the maxillæ they at once unrolled and felt about for the sweet 
object with their tips, and on putting a drop of sweetened water 
on the window frame in front of it, it eagerly lapped it with the 
maxilla, and on losing the place of the drop it felt around until 
it found it and then again lapped it. This experiment tends to 
show that both the sense of taste and touch must reside in the 
maxillze of the Lepidoptera, and not in the palpi. 
On removing the antenn of a Deilephila lineata which had 
just come from the chrysalis, it seemed to fly more vigorously 
than before, and to be rendered more restless in its motions. On 
Snipping off the antenne of an Agrotis subgothica which came in 
at a lighted window, it tumbled about headlong at times, being 
evidently top-heavy and confused. Another owlet moth, Draste- 
ria erechtea, on losing its antennæ did not seem to suffer, and 
Soon recovered sufficiently to fly out of the window upon the 
grass and to start up in its usual manner and fly off at my ap- 
proach. A Crambus similarly treated acted in a similar manner. 
` The sense of touch in the Lepidoptera does not evidently reside 
in the antenne alone, and all the experiments show that after 
the loss of the antenne if disturbed, jarred, or touched, they are 
_ Still sensitive and fly off. 
ew flies were experimented upon, the antennæ being 
snipped off. A Chironomus was much affected ; it flew about 
wildly bouncing on its head, and did not fly up the window-pane 
Upon partial recovery. On the other hand no effect was prc- 
