1867] 201 
to the Modern Classification of Insects," Vol. ii, page 474, of tlie 
record, by Heineken, in the " Zoological Journal " for 1829, of an 
experiment made by him on a species of Reduvius inhabiting Madeira, 
both antennae of a pupa of which he divided through the basal joint, on 
the 8th of August.—" Sept. 4. Reproduced, at the same time moulting 
into a perfect insect. They are of unequal lengths, thicker and shorter 
than the original ones, and, as far as I can ascertain, having only three 
instead of four joints." This is interesting, not only as shovv'ing that 
lost antennae may be reproduced, but also the exact period of life of 
the insect at which the reproduction occurred. It is not stated which 
particular joint was deficient, nor whether or not the terminal joint were 
perfectly formed. But the inference to be drawn from this experiment, 
in elucidation of the examples of 3-jointed antennae I have mentioned, 
is, that an antenna had in them been accidentally broken off while the 
insect was in the penultimate state, and was replaced by another, minus 
the joint, at the final change. 
The reproduction of legs, wholly or in part, had been noticed in 
Myriapoda, Crustacea, and Arachinda, also in hexapod insects of in- 
complete metamorphosis, but it it was doubted if the power existed in 
those where the metamorphosis was complete. Mr. Newport, however, 
subjected even the larvae of Lepidoptera to amputation of their legs, 
and those which survived the operation produced butterflies with limbs 
entire, even to the ungues, although some legs were small, and the 
spines of the tibiae generally absent. Reaumur had long ago recorded 
that hairs cut off caterpillars were reproduced at the moulting of the 
skin. 
With regard to the reproduction of antennae, although Mr. New- 
port proved that it took place in TuUdcs, Mr. Goodsir found in his 
experiments with Crustacea, that, notwithstanding the greater power 
of reproducing limbs in this class than in insects, if antennae were 
removed they were not replaced. It is, therefore, the more interesting 
to note such instances in the true insecta in which there is every reason 
to believe there has been a reproduction of antennae. And, ass\iming 
that in the cases I have quoted there has been a veritable reproduction, 
it is still a matter to be elucidated why it is always the penultimate 
joint that is suppressed, and yet the terminal one is perfectly formed. 
