150 THE ENTOMOLOGIST’S WEEKLY INTELLIGENCER. 
inability to arrest the force of impulsion 
continues to increase until we reach the 
neighbourhood of the bulb, when the 
voluntary employment of the wings 
almost ceases. 
All these results are obtained simply 
by the excision of the pectinations of the 
antennas, leaving the antennal stalks un- 
injured. The desire to fly is not affected 
in the first place, and it is only after the 
individual ascertains the uncertain nature 
of bis efforts that he fixes himself in a 
state of rest. 
The structure of the organs, together 
with these experiments, entirely justify 
the inference that the antennae, instead 
of being organs of any special sense, as 
they are usually regarded, are in Lepi- 
doptera instruments of atmospheric pal- 
pation, having especial reference to the 
action and use of the wings in flight. 
This conclusion has been reached con- 
trary to my own preconceived ideas of 
the functions of those instruments, and I 
believe the view here taken is entirely 
new. Should the experiments be re- 
peated by auy observer, he should be 
careful to select for experimental study 
those Lepidopterous insects that are un- 
provided with simple eyes or ocelli on 
the vertex at the base of the antenna?. 
In those species with ocelli on the vertex 
flight is deranged scarcely at all, as com- 
pared with the effect of antennal excision 
on individuals unprovided with these 
organs. — Dit. Clemens (in the' Journal 
of the Academy of Natural Sciences ,’ 
PhUadel/diia). 
LABELLING INSECTS. 
To the Editor of the ‘ Intelligencer.' 
Sir, — I venture to send you a few 
remarks on this subject, together with a 
short extract from my catalogue, as an 
ocular demonstration of the plan I follow. 
The extract is from my Coleoptera, for, 
as Lepidoptera hold but a secondary 
rank in my studies, the Catalogue re- 
ferring to them is not yet complete. 
However, I may premise that they are 
to be entered in the same way. 
In the first place, I put a numeral to 
every specimen, excepting when two or 
more of the same species have been taken 
at the same time and place; in that case 
the same numeral is attached to each 
specimen. The labels I cut myself (I 
enclose two or three) from sheets of note- 
paper with a punch manufactured from 
part of an old gas-pipe; though very 
primitive it answers exceedingly well. 
Of course, when obtainable, a pistol- 
punch (as recommended to me by Mr. 
Janson) is preferable, as not requiring 
such attention to keep it in order. 
This mode of labelling I tbink much 
preferable to that of your correspondent 
Mr. Wallace, as you can turn to any 
insect immediately by inspecting the 
numeral underneath. Besides, when you 
are unacquainted with the name of the 
insect, and with most collectors of Cole- 
optera and some of Lepidoptera this 
must be the case, pray how would you 
find the insect referred to if you put the 
numeral I to the first specimen of each 
species? Perhaps Mr. Wallace will 
kindly explain. 
481. Aromia moschata. Common on 
trunks of willow trees ; Southport, 
VII. 10-21, 1858. 
482. Clytus arcuatus. Presented by Mr. 
Knapp. 
483. C. mysticus. Beaten from lilac tree ; 
Windsor. VIII. 1858. 
484. C. arietis. Common in garden ; 
Eye. VII. 13—17, 1859. 
