C. Warburton 
t 
ever been found, and these had chanced to be among its more ill- 
characterised specimens, a very inadequate idea would have been 
obtained of what may be considered its normal appearance. 
A further word with regard to specific descriptions of Rhi'picejphalus. 
In view of the uniformity of certain structures throughout the genus, 
and of the great variability of others within the species, it seems 
desirable to depart from the method—which has been found convenient 
in the case of other genera—of proceeding at once to describe all the 
external features in sequence. It will be more useful to preface such a 
description—which will often be of a somewhat indefinite and general 
nature—with a brief statement of the salient characteristics upon wdiich 
the species is chiefly based. A similar method has already been 
adopted by Dbnitz (1910), who alone of previous writers has at all 
appreciated the very unstable nature, in species of Rhipicephalus, 
of structural features which appear to be remarkably constant in other 
genera. 
Rhipicephalus neavei n. sp. 
Figs. 2, 3. 
Male. Salient features: Inornate; Basis capituli much broader 
than long; lateral angles near the middle, and somewhat acute. Coxa I 
strongly prominent anteriorly. Punctations numerous, small, rather 
unequal, absent immediately in front of the eyes. Lateral grooves well- 
marked, including no festoons. Dorsal furrows distinct, the laterals 
small, oval and detached. Anal plates of characteristic shape (see 
Fig. 2), the external and posterior borders almost at right angles; the 
internal border projecting inwards distally. Spiracle narroio, only 
slightly curved. 
Detailed description:— 
Dorsal aspect : Palps short, flat dorsally, articles 2 and 3 
about equal; posterior border of article 2 straight; article 1 only 
slightly visible. Basis capitidi with straight posterior border and strong 
cornua; lateral angles rather acute and directed somewhat backwards 
(especially on under surface), the antero-latei’al border somewhat convex, 
the postero-lateral concave; the median field generally punctate, 
especially posteriorly. Scutum measures 3'6 x 2 mm. in a fairly well- 
developed specimen, punctate all over except the region immediately in 
front of the eyes and the fold external to the lateral grooves. The 
strong punctations which in the f generally correspond to the lateral 
grooves of the $ are absent. 
