380 
Biology of Plithirus })iibis 
Woman, aged 22, many lice present on the piihis, in the axillae and 
on the head (Rona, Monafsh. f. prakt. Dermatol., xxvi, 105). Patient 
in hospital, with lice on body and head (Dyer, ibid. p. 270). Both of 
these authors are cited by Waldeyer. 
Arab, aged 45, lice very numerous on beard, moustache, eyelashes, 
eyebrows, head (a dozen being easily found). The lice appeared to be 
flourishing and plenty of nits were found in these situations (Brault and 
Montpellier, 1914, p. 78). A case of the kind is recorded apparently by 
Dyer (1897, p. 23). 
Two cases, men in Dublin, generalized infestation including eye¬ 
lashes and eyebrows, but none on the scalp (Knott, 1905, pp. 188, 
189). 
In 1915 I had occasion to examine several soldiers who were infested 
to a varying degree. One of them had active stages and nits present in 
hundreds all over his body excepting only his head, hands, and feet. 
The soldier was not unusually hairy. The lice and nits were found even 
on the back and sides of the trunk, etc., where the hairs were very far 
apart. 
Cases of infestation confined to the head. 
[a) Infants and young children; 
Three cases, little girls, wherein the hair of the scalp was infested; 
in one the lice also occurred on the eyebrows. One of the girls, aged 7, 
bore 30 lice on the eyelashes, 10 on the eyebrows, many on the hairy 
margins of the scalp. All stages of development from nit to adult were 
found in these situations (Grassi, 1881, p. 433). 
Three cases, children aged respectively 1|, 2 and 3 years, on whom 
nits occurred on the eyelashes only (Bleicher, 1882, p. 976). 
Infant of 5 months, infested upon the eyelashes only, through its 
wetnurse (Trouessart, 1891). 
Infant of 14 months, infested with many lice on the eyebrows, eye¬ 
lashes and hair of scalp (Heisler, 1892). 
Infant a few months old, the lice present in swarms on the head; 
had become infested through the mother. After the infested child had 
reposed for a short time in the same cradle with another infant, the 
latter’s eyebrows became infested (Monier, 1892, Rev. biol. Nord de 
France, No. 6). 
Boy of 5 2 - years, with lice upon eyelashes and head; the father found 
to be infested (Gallemaerts, 1893, Journ. malad. cvtan. et syph., p. 526). 
Family consisting of a mother and five children aged 3, 5, 7, 9 and 
