204 
Transactions of the 
C Monthly Microscopical 
Journal, Api ll 1, 1S69. 
take the liberty of referring to these notes pretty freely in the few 
imperfect remarks I have to make. 
To begin — it may be well, so far as it relates to the subject, to 
give a brief sketch of the classification he adopts. 
The Thysanura are primarily divided into Lepismidas, whose 
bodies terminate in setse, and the Poduridse, whose bodies for the 
most part terminate in a bifid tail, which is kept folded under 
the body when the insect is at rest. 
The Poduridse again are divided into Smynthuridse, having the 
body more or less globular ; the Poduridse, having the body linear ; 
and the Li^uridw, whose bodies are linear; but the bifid tail is 
rudimentary, or entirely absent. 
The second of these divisions is that to which all the creatures 
I have now to bring under notice belong, and it is divided into 
eight genera : — ■ 
1 . Orchesella : the antennae of which are long and six-jointed ; 
the eyes, six on each side, arranged in the form of the letter S ; and 
no species that I have yet found is furnished with scales. 
2. Degeeria : the antennae of which are four-jointed ; the body 
more or less spindle-shaped ; the eyes, eight on each side of the 
head, sometimes clothed with scales, and sometimes with hairs. 
3. Templetqnia: the antennae five-jointed, with the terminal 
joint ringed ; and, in the single species which has come under my 
observation, furnished with scales. 
4. Isotoma : having simple hairs, and no scales ; antennae four- 
jointed ; and eyes, seven on each side of the head, in the form of an S. 
5. Macrotoma : having very long, straight, four-jointed antennae, 
the two terminal joints being ringed; eyes, six on each side; and 
an abundance of scales. 
6. Lepidocyrtus : antennae long, four-jointed ; eyes, said to be 
eight on each side (but I have failed to count them) ; an abundance 
of scales; and a peculiar habit of carrying the head, not easily 
described, but, when once seen, remembered without difficulty. 
7. Podurm : hairs simple ; no scales ; eyes, eight on each side ; 
antennae four-jointed ; saltatory appendage of moderate length. 
8. Achorutes : antennae short, four-jointed ; eyes, eight on each 
side ; saltatory appendage quite short. 
It will thus be seen that my remarks on the Scale-bearing 
Podurse will be confined to the genera Degeeria, Temjpletonia, 
Macrotoma, and Le^idoeyrtus. 
Originally my efi'orts were limited to procuring specimens of 
the respective scales, but soon my attention was diverted to the far 
more interesting employment of studying the habits of the insects 
from which I obtained them. To compass this end, it was neces- 
sary to provide some means of keeping the creatures alive and in 
health for prolonged periods, and to permit the employment of 
microscopic power upon them at any time meanwhile, without 
