NI 
a) 
PARASITOLOGY. 
IXODIDAE. 
This family includes a group of ticks, the head 
parts of which are slightly longer than broad. The 
palpi are short. The head is provided with mandi- 
bles and hypostome as in the preceding family. 
RHIPICEPHALUS SANGUINEUS (Sanguis—blood.) 
Distribution.—Has been reported in Southern 
states. 
Description.—Resembles the Bodphilus Annulatus 
in size and shape, though the head is more prominent 
and the palpi are short and broad, but longer than 
the hypostome. The base of the capitulum (or head 
parts) is broader than long, forming a projecting an- 
gle at each side. In the male the dorsal shield is 
red and covers nearly all of the dorsal surface. 
Animals Infested —Cattle and other animals. This 
tick transmits the piroplasma canis in Europe. 
IxoprEs Ricinus (Ricinus—castor oil plant; eidos—like.) 
Synonym.—Castor bean tick. 
fTistory.—Found in America, Europe and Africa. 
Description.—In shape it resembles the castor 
bean. Its color is variegated like that of the castor 
bean, the dorsal shield being a deep chestnut brown. 
The mandibles are armed with teeth; the hypostome 
is lanceolate in shape, each haif being provided with 
six rows of denticles. The body of the male is flat, 
oval and of a deep reddish brown, the dorsal shield 
covering almost all of the dorsal surface. 
Animals Infested.—It attacks the cuticular surface 
of the horse, ox, dog, etc. 
