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or four rows of teeth. Scutum often with coloured 
designs of specific importance. Stigmata usually 
triangular. Eleven festoons in the male. 
(1) A. hebraeum. — S . Marginal festoons all green 
except the two outside ones which are brown. Scu¬ 
tum : sulphur colour marked with brown, the pattern 
not in the form of an H or Y. Median posterior 
linear spot separate from the anterior spots. Marginal 
groove extends to the posterior border. Legs brown 
with white distal spots on segments 2, 3, 4, and 5. 
? . Scutum as broad as long, triangular posterior 
borders almost straight. On margin of scutum one or 
two minute £ eye-spots, 5 i.e ., a dark point surrounded 
by a bright circle. Punctation scanty, thick on sides. 
Shews metallic lustre. Eyes spherical, flat in anterior 
quarter of scutum. Coxa I bicuspid. Coxa IV no 
spine. S. Africa. 
Pathogenicity. —Transmits 4 heartwater 5 in sheep, 
the cause of which is unknown. 
Bionomics. —The tortoise, variegated or bont tick. 
Leaves its host for each moult. It is a very large 
species, and the females will only bite if males are 
already in situ. 
(2) A. americanum. —The Lone Star tick; on 
cattle. 
Genus Hyalomma 
Eyes present. Rostrum long. Anal groove as in 
A^onomma. Body elongate, oval, colour more or less 
deep brown. 
S . Very long palpi ; two pairs of ventral plates, 
the inner triangular, the outer smaller and straight. 
Stigmata comma-shaped with a long tail. Scutum 
festooned posteriorly. Tarsi spurred. 
