3 21 
Genus Eurhipicephalus 
(= Rhipicephalus in part).—Eyes present. Base 
of rostrum when looked at from above hexagonal 
forming an angle on each side. Differ from genus 
Margaropus in the following points :— 
(1) Stigmata comma shaped in $, shorter in ? . 
(2) Eleven marginal festoons. 
(3) Anal groove present in 2 . 
(4) First segment of palp bears on the ventral 
inner surface a plate which may be pro¬ 
longed into a hook or spine and which bears 
five to seven feather bristles (cp. Mar- 
gar opus). 
(5) Coxa I deeply incised, producing two long 
cusps. 
$ . A single pair of anal plates, the accessory pair 
only slightly developed; in Margaropus , they form a 
second pair. 
2 . Stigmata round. Scutum, polygonal, posteri¬ 
orly; not triangular as in Margaropus. 
Bionomics. — Eu. evertsi changes its host between 
the nymphal and adult stage, while Eu. appendiculatus , 
the ‘brown tick’ and Eu. simus , the ‘black-pitted tick,’ 
change their host after the larval and nymphal stage. 
(1) Eu. appendiculatus. — ^ . Palpi flat dorsally, 
with convex margins. Tooth on first segment well 
developed. Scutum uniform in colour. Marginal 
furrows single. The posterior accessory furrows join 
the festoons. Eyes flat, scutum with numerous, 
unequal, chiefly fine, generally regularly scattered 
punctations. ‘ Tail ’ twice as long as broad (only 
visible when the male has fed for some days). Coxa I 
with a long anterior prolongation visible from the 
dorsum (cp. Eu. sanguineus). 
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