The Genera Boophilus Rhipicephalus and Haemaphysalis (Ixodidae ...

Length and width about equal, each 0.48 to 0.57. Subpentagonal;
Seutum.
.eyes faint. Cervical grooves as broad shallow valleys, divergent
Small, convex; one or two hairs on each coxa. Coxae I, II,
Coxae.
III each with one short, broad, rounded spur; IV with spurs
and
Length from tips of palpi to posterior margin, 0.63; width,
Body.
Short oval. Scutum occupying about half the length of the body.
0.45.
Length from tips of palpi to posterior margin, 0.15;
Capitulum.
0.15. Lateral profile lines of basis convex; posterior margin mildly
width,
or straight. Cornua absent. Palpi short, bro.ader and with hairs
convex
than in microplus; article 1 absent. In ventral view, basis broadly
shorter
behind.
rounded
Short, broad, with about five denticles in each file. Den-
Hypostome.
2/2. Length about 0.08.
tition
of the old genus Booph.ilus Curtice, Minning (1934) made 3 sub.-
Out
as follows" 13oophilus including 6 species and subspecies, Palpoboophilus
genera
including one species, and Uroboophilus including 11 species.
12 are
specimens collected from many parts of the world, but he showed little
of
of having given adequate attention to the effect of variation in
evidence
t,o the obvious desirability of pointing out distinct correlat-
speciationand
criteria in erecting new subgene.ra, species, and subspecies. His very
ing
figures are not convincing.
s.mall
annulatus (Say) was described from deer, "Cervus virginianus",
Boophilus
Florida and Ixodes boris Riley, a synonym, was described from
tau.rus Missouri. This tick was widely distributed in the Southern
Bos
at about the beginning of this century; bt because it was the
States
Texas, Oklahoma, Arkansas, Missouri, Louisiana, Tennessie,
follows"
Alabama, Kentucky, Virginia, North Carolina, South
Mississippi,
15.
Denticles 3/3. About seven denticle.s in each file. Length
Hypostome.
0.16.
about
posteriorly.
Surface smooth, shining; punctations and hairs absent.
Legs.
Short, moderately heavy.
absent.
LARVA
Of the total of 18 species and subspecies appearing in the paper,
described as new. In his studies,
M,inning had before him numerous lots
HOSTS AND DISTRIBUTION
of the very destructive Texas cattle fever, eradication measures
vector
applied and have reduced its numbers to, or near, .extinction in the
were
States. At its worst, it was present in all or parts of 16 States as
United
Georgia, Florida, and California. In Mexico, this tick was
Carolina,
and still occurs there.
present