Gr. H. F. Nuttall 
139 
In my previous papers, whilst I quoted Fabricius (1775 and 1794), I 
omitted to cite his publication of 1805 to which my attention has since been 
drawn by a reference of Fahrenholz’s (1915). On consulting Fabricius (1805), 
I find that he describes lice from negroes as P. nigritarum n.sp., distinct from 
P. Inumanus : 
Habitat in Nigritarum corpore. Dom. Smidt. Mus. Dom. Lund. 
Paullo minor P. humano. Caput magnum, planum, laeve, triangulum, antice, subbi- 
fidum, atrum. Corpus subrugosum, atrum, immaculatum. 
Therefore, as Fahrenholz notes, Fabricius appears to be the first to have 
regarded the lice of negroes and Europeans as distinct species. Denny (1842, 
p. 15) states that Latreille “designated” P. nigritarum as a species; Fahren¬ 
holz, however, finds no record of Latreille having created this supposed 
species. 
Olfers (1816, Pars I, p. 81, cited by Fahrenholz 1915, p. 591) regarded lice 
from Ethiopians as a distinct species which he named P. nigrescens. Fahren¬ 
holz is almost right in regarding nigrescens as “doubtless” a synonym of 
nigritarum. 
Fahrenholz degrades Fabricius’s nigritarum to a variety of corporis and 
ventures to describe the variety from a single $ which he assumed represents 
the form named by Fabricius. Fahrenholz states that his specimen (from the 
Tana region) represents a distinct variety differing from negro head-lice as 
follows: Antennae not linear like European body-lice, but of inverted pear- 
shape (“umgekehrt birnformig ”)#; sternum present#; the last abdominal 
segment bears two brown plates dorsally (as in negro head-lice)#. 
P. humanus chinensis Fahrenholz 1916. 
A sub-species. 
Fahrenholz (x. 1916, p. 87) states of this form that it occurs on Chinese, 
is “ distinctly larger " % than “P. humanus marginatus ” (vide infra), and has 
finely dentate claws.# Of the he writes: “ schwachen Querplatten auf dem 
Abdomen •, aber auch mit gut entivickelter Genitalplatte •. Sternum vorhanden •. 
Allgemeinfarbung braunlich-gelb (in balsam)#.—Lebt auf Chinesen.” 
Fahrenholz (1917, pp. 2, 6 and text-fig., reprint) states that he identified 
specimens of this form at the Hamburg Museum 1 . They came from Fokim, 
China, and he assumes that the host was a Chinese. He comments that they 
are “distinctly different from those on Japanese'' and gives elaborate 
measurements and a figure of the $ sternum with two hairs anteriorly but 
no “holes”#. 
1 The lot also contained some examples of capitis “die vielleicht ebenfalls einer neuen Unterart 
angehoren” (!). 
