140 
Purported New Species , etc . 
P. humanus marginatus (Fahrenholz 1915) Fahrenholz 1916. 
A sub-species. 
Synonyms: 
tk P. corporis de Geer var. marginatus n.var.” Fahrenholz 1915, p. 599. 
P. humanus marginatus Fahrenholz vn. 1916, p. 270, and x. 1916, p. 87. 
Lice from Japanese, which Fahrenholz believes to be identical with the 
form described by Murray (1861) as having no spine on leg I. Fahrenholz 
found, however, that a spine is present and was doubtless lost in the prepara¬ 
tion of Murray’s specimen. When mounted in balsam, the lice appear pale 
yellow#, black-brown at the sides of the abdomen#, and in places on the 
head#. The sternum is “totally absent#.” The $ shows no ventral plates# ; 
whilst of the dorsal bands only the anterior one of each segment is 
well developed, the posterior one being scarcely visible#; these hands do not 
occur in European body-lice%, compared to which they are somewhat smaller#. 
In his two papers of 1916, Fahrenholz raises his variety to the rank of a sub¬ 
species, and adds (x. 1916, p. 87): It is much smaller than the European louse# 
and has claw I dentate#. “Am Abdominalrande schwarzbraune Chitin- 
leisten#. Sternum fehlt vollkommen#, ebenso beim die Genitalplatte#. 
S im Gegensatz zur Europaerlaus mit Querplatten auf dem Abdomen#. 
Allgemeinfarbung gelblich#.—Lebt auf Japanern.” 
“P. humanus humanus L.” of Fahrenholz 1917. 
A sub-species. 
This new form of terminology, for which Linnaeus need not be held 
responsible, is applied by Fahrenholz (1917, p. 1, reprint) to specimens in the 
Hamburg Museum labelled “Negerlause aus Sansibar.” Fahrenholz greatly 
doubts their recorded origin because they are similar to European body-lice, 
which, as a piece of special pleading, is difficult to match. He writes: “Der 
Wirt ist mir sehr zweifelhaft, da die Individuen keine Abweichungen von 
typischen Europaerlausen aufweisen#.” 
P. capitis angustus (Fahrenholz 1915) Fahrenholz 1916. 
A sub-species. 
Synonym: 
“P. capitis de Geer var. angustus n.var.” Fahrenholz 1915, pp. 597-8, 
PI. XXI, fig. 1 (photo of 9), text-fig. 2 (<J abdomen in dorsal aspect). 
This form, found on Japanese, is described from balsam-mounted speci¬ 
mens (d $), Fahrenholz stating that the colour is distinctive#. The $ shows 
dorsal bands#, brown sternum#, and genital plate# which are absent in 
European lice#; claw I is longer and more curved than in the $, and finely 
toothed irregularities only occur in place of teeth#. 
