398 
Messrs Nuttall and Warburton, 
punctations, especially posteriorly on the pseudoscutum ; a non- 
punctate depression on either side of the centre ; cervical grooves, 
deep, straight, parallel ; lateral grooves short, including first festoon. 
Venter brown ; spiracles white, bluntly piriform. Capitulum pro- 
portionately large ( - 3 mm. 1.), base finely punctate, cornua slight; 
palps: article 2 projecting strongly laterally, article 3 with dorsal 
and ventral retrograde processes at inner angle ; the outer borders 
of articles 2 and 3 form an unbroken line ; hypostome broad, 
dentition 4|4. Legs brown, coxae strong, with a single short spur 
on each, strongest on coxa I. 
Female (unfed), L. 15, W. 1*1 mm. Body (Fig. 9 G ) brown, 
punctate, marginal grooves well marked. Scutum elliptical (‘9 x '7 
mm.) sides nearly parallel, many rather large punctations, some 
confluent ; cervical grooves long, nearly parallel, middle field broad, 
no lateral grooves. Venter brown ; spiracles white, rounded. 
Capitulum proportionately very large ( - 6 mm. 1.) with character- 
istics of £ (hypostome, Fig. 10) ; porose areas large, oval, far 
apart. Legs paler than body, coxae as in ^ . 
Fig. 10. ? hypostome, 250 n l. 
Origin. Description based on 1 / and 2 $ from fowl, 
Sarawak, Borneo, collected by Dr A. R. Wellington, 1907. 
(Preserved in spirit.) 
Note . — $ Digit (Fig. 11) 100 p long, with dorsal process somewhat heart- 
shaped, protruding outwardly in the form of two rounded teeth, external 
article 4-toothed, the two distal teeth small. 
Rhipicentor n. gen. Nuttall & Warburton, 1908. 
Characters of Genus. <f resembles Rhipicephalus dorsally, 
Dermacentor ventrally. Basis capituli hexagonal with very pro- 
minent lateral angles. Coxa I strongly bifid and overlapping 
coxa II in f and $ ; </ coxae progressively increasing in size 
to pair IV which is much the largest, pairs II — IV bifid. Adanal 
shields absent. Eyes present*. 
* The description of the generic characters is based upon the examination of 
two species : Rhipicentor bicornis and a second species which will be described by 
our colleagues, Messrs W. F. Cooper and L. Robinson. 
