414 
The Ohio Naturalist. 
[Vol. VI, No. 2, 
Sept. 30th. — I found none with eggs and fewer specimens. 
What has become of them? Some doubtless lost their life by 
drowning in drops of water precipitated upon the glass, but this 
does not account for all missing. 
Oct. 20th. — Found tw'o dead and one small one alive. Found 
one in moulting nest preparing to cast. 
Jar C. Sept. 7th. — Bark arranged in concentric layers and 
populated with adults. All seem contented. Found eight 
specimens with yellow bunches of eggs. One encased in moult- 
ing nest. One with small one in jaws (cannibalism?) No 
small ones were put into this jar nor any with eggs. 
Sept. 30th. — Looked over Jar C where previously there were 
adults with eggs, and now I find none. The number of adults 
is fewer. What has become of them? Do they eat each other 
and also the females with eggs? Have not noticed any undue 
amount of empty skins, did however oljserve remnants of 
pedipalps, etc., at the bottom of the jar. 
Oct. 21st. — There are now eight specimens living and four 
found dead. None with eggs. One small -one in moulting nest 
])reparing to cast, found Oct. 20th, casted Oct. 23d, but at 
eleven a. m. still in the nest. Two days later “baby” is out of 
its nest and under bark. 
June 3d, 1808. — All specimens are dead in all the jars. Some 
shells and claws of them only can be found. Some little white 
hexapods, also some black ones, and some small mites are living 
in the jars. 
Breeding, Nests, Moulting. — The genital opening is 
located ventrally between the second and third abdominal seg- 
ments, and it is here that the female carries her eggs in a small 
whitish pouch. The young are hatched within this pouch and 
remain there until ready to shift for themselves, being nourished 
in the mean time by a fluid secretion from the mother. This 
secretion is produced either by the oviduct or by some other 
glandidar structure within the genital opening. The pouches 
enlarge as the young increase in size, until they become quite 
cumbersome for the mother to carry. I have counted twenty- 
four eggs in a pouch. Metchnikoff says about fifty and that 
they are one-tenth of a millimetre in diameter. Barrois says 
that he found about thirty. It is generally understood that the 
young are nourished in the pouch. 
Moulting Nests . — I shall next describe more fully the moult- 
ing or casting nests. These are composed of a wall of small 
fragments of wood and bark that completely incloses a circular 
or oval space three to four millimetres in diameter. One of 
these little nests extends from the wood of the tree to the bark, 
and is lined with silk. When a young specimen is ready to 
shed its skin it builds one of these nests, suspends itself 
