The Genera Boophilus Rhipicephalus and Haemaphysalis (Ixodidae ...

or absent. Palpi short, poorly sclerotized; transverse ridges faint.
faint,
of the chelicerae very long, fully twice as long as the palpi.
Sheaths
hairs few, not conspicuous.
Palpal
Short and broad. Denticles 3/3 with about five in each
H'ypostome.
Length about 0.14.
file.
Pentagonal. Length and width equal, each about 0.45. Cer-
Seutum.
grooves as shallow valleys, divergent posteriorly. Eyes small, oval,
vical
Surface smooth, shining. Punctations absent. Hairs few.
faint.
Small,-convex. Coxa I with a short, broad, rounded, external
Coxae.
II and III about as in I but progressively smaller; IV, spurs
spur;
Length from tips of palpi to posterior margin, 0.15;
Capitulum.
of basis, 0.18. Lateral profile lines of basis convex; posterior
width
nearly straight. Cornua absent. Palpal article absent. In
margin
view, basis broadly rounded behind. Palpi with relatively long
ventral
hairs.
Short, broad, with about six broad, short, rounded den-
Hypostome.
in each file. Dentition 2/2. Length about 0.065.
ticles
Length, 0.31;width, 0.42. Cervical grooves shallow, short,
Scutum.
posteriorly. Surface smooth, shining, impunctate, and with
converging
absent.
hairs
Coxa I with a short, broad, internal spur; II and III without
Coxae.
spurs.
AND DISTRIBUTION
HOSTS
microplus (Canestrini) was described as
Haemaphysalis n4i-
Boophilus
from specimens that came from Paraguay. Salmon and Stiles
cropla
referred to this tick as australis Fuller and mentioned that
(1901)
from Argentina, and from deer, ox, and horse from Brazil. Osornoman
(1941, p. 429) mentions it as present in Colombia. Dunn (1923,
Mesa
21) under the name Mrgaropus ann, ulatus australis, records the tick
p.
cattle in Panama; and Fairchild (1943, p. 586) states it is common
from
cattle in Panama and is also found on horse, dog, goat, and deer.
on
(1923, p. 202) mentions the tick under the name Margaropus
Valadez
21
Legs.
Short, moderately heavy.
absent.-
LARVA
Length from tips of palpi to posterior margin of body, 0.60;
Body.
0.42. Short oval. Scutum occupying about three-fifths of the length
width,
the body.
of
as present on cattle in this country. Arago, in various papers has
species
the species as present on cattle, deer (Maa.ma sp.) horse, and
mentioned
annulatus australis as present in Mexico.
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