20 RMpicepJialus 
often transparent and give the effect of being superposed on the anal 
plates proper to R. simus. The females also, of which we possess several 
specimens, differ fi’om a typical R. simus $ in having their scuta usually 
more angular and more punctate, but the females of undoubted R. simus 
differ considerably in this latter respect. 
The lunulatus form of R. simus occurs frequently on large mammals 
in Nyasaland. The type was from a horse in the Congo Free State, 
near the river Lualaba. 
To recapitulate, R. lunulatus must be degraded to a variety of 
R. simus. R. glypliis lapses to a synonym of R. simus var. lunulatus. 
R. longus Neumann, 1907. 
The single type specimen (a male) of this species proves, on careful 
examination, to be a somewhat ill-characterised example of R. falcatus. 
Among the numerous specimens of R. falcatus possessed by us there 
are several specimens which match it precisely. R. longus (type at 
Cambridge) therefore lapses and becomes a synonym of R. falcatus. 
R. supertritus and R. coriaceus. 
The types of R. supertritus Neumann, 1907 in the British Museum 
are identical with the form described by Nuttall and Warburton 
(N. and W. 1907) as R. coriaceus. 
The descriptions both bear the date 1907, but as that of R. coriaceus 
was only published on Dec. 28, R. .supertritus doubtless has priority. 
R. coriaceus, therefore, becomes a synonym of R. supertritus. 
REFERENCES. 
The references are to the “Bibliography of the Ixodoidea” in Ticks, a Monograph 
of the Ixocloidea, Cambridge University Press, 1911. 
