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 two 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 observe 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 

 preparing 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, 1898. — 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 

 glandular 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 



