G. H. F. Nuttall 
3 
N.B. Comments by the writer on the contents of some of the 
publications are enclosed in [ ] brackets; some of these papers are 
valuable, others the reverse, and in the latter case they will not as a rule 
be referred to again. The small capital letters in brackets [i. c.], [i. m.], 
[m.], etc. are added toward the end of those references only that have not 
been personally verified; the letters indicate the sources whence the refer¬ 
ences were derived as described in the foregoing paragraph. 
The capital letters or abbreviations in large type at the end of the 
references serve as a key to the chief contents of the publications they 
accompany; they are intended to facilitate the work of those who may 
use the bibliography. In the case of publications that have not as yet 
been consulted by me, the key is merely based on the indications afforded 
by the title; this also applies to papers of this class dealing with 
“ Phthiriasis,” where the key Ph. may be somewhat misleading because 
the term has frequently been applied in place of Pediculosis. The 
explanation of the key-lettering is as follows: 
A = Anatomy and histology of lice. 
B = Biology, including physiology of lice. 
D = Diseases conveyed and injurious effects produced by lice. 
E = Enemies and parasites of lice. 
Epid. = Epidemiology (pure) of Typhus and Relapsing fever as described 
by authors prior to the discovery that lice serve as vectors. 
G = General reference to lice. Usually contained in text-books and 
mostly unimportant. 
Geo. = Geographical distribution of lice. 
H = Historical. 
I = Iconography (usually when of special interest). 
K = Killing of lice, including general prophylaxis and treatment. 
0 = Nothing original in the publication. 
P = Popular. 
Ph. = Phthirus, or affections due to this insect and their treatment. 
In the unverified references, as indicated before, “Phthiriasis” 
may mean Pediculosis, the terms having been frequently inter¬ 
changed in the past. See also under G, i, s. (PlitMrus is 
commonly misspelt Phthirius.) 
R = Related forms (Anoplura and Mallophaga) whose structure bears 
on Pediculidae. 
S = Systematic, or giving a general description of the characters having 
systematic importance in relation to lice. 
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