Gr. H. F. Nutt all 
81 
Oviposition ........ 
The process oi oviposition ...... 
Orientation and mode of attachment of the egg 
Influence of temperature on oviposition . . . . 
On the number of eggs laid by P. humanus under different 
conditions. Observations by previous authors . 
The number of eggs laid by P. humanus {corporis) under 
natural conditions. Daily average and total 
The number of eggs laid by capitis in a wristlet . 
The preference shown by corporis for laying on certain 
fabrics. . ...... 
The number of eggs laid on hair as compared to cloth bj 
corporis and capitis : 
Bacot’s observations ....... 
The Author’s observations..... 
The “homing instinct” in respect to oviposition 
The laying of unfertilized eggs...... 
Summary regarding oviposition ..... 
Hatching: The time required for hatching .... 
Delayed hatching ....... 
Development of the larva in the egg .... 
Manner in which the larva issues from the egg 
The empty shell. 
Fertility: Proportion of the eggs that hatch and that are fertile 
Length of time a female remains fertile after fecundation 
Fertilizing power of the male ...... 
Development from larva to adult—the moults 
The act of moulting ....... 
Loss of life during development ..... 
Duration of the life-cycle of pediculi on man 
Hypothetical number of descendants of one female within a 
limited period ........ 
Longevity of lice (different stages) when starved . 
Longevity of lice (adults) when fed ..... 
Feeding habits—the frequency with which lice feed—the 
gorging of lice—time occupied in feeding 
Digestive processes ......... 
Some reactions of pediculi: 
Reactions to light—heliotropism—effect of light on develop¬ 
ment .......... 
Reactions to warmth—thermotactic reactions—effects of 
warmth on activities and metabolism 
Do lice possess an olfactory sense? .... 
Gregariousness ......... 
Vital resistance to immersion in water, cold, exposure to a 
vacuum and to mechanical pressure 
Sham death, and the signs of death in lice . 
Natural enemies and parasites of lice ..... 
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Parasitology x 
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