4i6 
The Ohio Naturalist. 
[Vol. VI, No. 2, 
The following observations by J. Barrois (IV) upon a chelifer 
living in the temperate zone are interesting, and show that 
females may build nests, but evidently for themselves and not 
for the brood. This chelifer was found in small closed nests 
under rocks. Only the females built the nests. The males hid 
as best they could and were smaller and fewer than the females. 
Between October and February the occupants were plump with 
swollen abdomens. By the end of April or May the nests were 
empty or contained only an emaciated female. The eggs were 
not laid before January, but after that they were found in a 
])acket adhering to the vulva, with the cavity of the packet in 
free communication with the oviduct, evidently a nutritive 
adaptation. Here we see how the female uses a nest for another 
purpose. In the tropics where my observations were made, 
such an adaptation would hardly be necessary and I do not 
think that it exists. 
Moulting . — I made no observation indicating the number of 
times pseudoscorpions moult. That they moult after becoming 
sexually mature is probable from the fact that the normal gen- 
ital openings appear when they are about three-fourths grown 
and that they produce eggs at that stage. Smaller animals 
show no signs of genital openings. Then again, a case of regen- 
eration of a pedipalp (descr. below) indicates that mature ani- 
mals probably moult even when apparently full grown. In 
arthropods generally the enlargement of a regenerating organ 
takes place at moulting time, in fact regeneration ]>resupposes 
moulting, and if the same rule holds true for pseudoscorpions, 
it suggests that older specimens may moult. (See, however. 
Moulting Nests.) 
The manner of moulting is as follows; The dorsal skin of 
the cephalothorax splits at the anterior and lateral margins, 
remaining hinged posteriorly. The animal then extricates it- 
self through this opening. This is the situation indicated by 
the exuviae examined, in which this skin exists as a hinged lid. 
Regeneration . — I found a few specimens that had lost one to 
sev'eral segments of the ])edipalps, and one specimen with a 
large (normal) pedipalp and a small one of about half the nor- 
mal size. The smaller pedipalp was of lighter color and thin, 
and in every way suggested a case of regeneration similar to that 
found in crabs. 
Body IMovemexts, Light or IIe.\t. — A pseudoscorpion can 
retract one or both of its chelicerae and move them in any 
direction. The pedipaljis can be moved in any direction and 
the trochanter and femur folded back almost against the sides 
of the body, the tibia and the chelae, or hand, extending for- 
ward. It cleans the chelae of its pedipalps with its chelicerae, 
or mandibles, using them either singly or as a pair. The legs 
are used in pairs when walking, and those of each side constitute 
