The Genera Boophilus Rhipicephalus and Haemaphysalis (Ixodidae ...

capituli. Its dentition is expressed by a ratio. Thus 3/3 means that there
basis
three longitudinal files on each half of the hypostome. Measurement is made
are
the base to the anterior extremity.
from
CARINAE: On the scutum in all stages, paired lineal elevations outside
LATERAL
cervical grooves, and usually more declivitous on their inner sides, and
the
so faint as to be indefinite. Often absent.
sometimes
GROOVES: In males, grooves at the sides of the scutum.
LATERAL
The sequence of the legs from anterior to posterior is indicated in Roman
LEGS:
I, II, III, and IV. Measurements of the articles are made on the
numerals
side since they "telescope" dorsal the ventral side.
on
A tongue-shaped retrograde, sclerotized projection LIGULA: the venter of
on
article 1.
palpal
GROO'VES: In females, grooves at the sides of the body posterior to
MARGINAL
scutum.
the
GROOVE: A dorsal body groove, on the middle line back of the scutum.
MEDIAN
Paired, articulated appendages on the basis capituli lying parallel with the
PALPI:
and chelicerae. Four articles were originally present in all ticks,
hypostome
the proximal article may be obsolescent or absent. In the genus
but
palpal articles 2, 3, and 4 are plainly visible, and all articulations
Boophilus,
movable, though between 2 and 3 the movement is only slight. The articula-
are
between the basis capituIi and article and that between and 2 is confusintion
by reason of the fact that has been much reduced or may be absent.
present at all, is represented only by a sclerotized spot, or plate, on the
If
side (toward the hypostome) which may be very indefinite, a distinct
inner
"ligula." (See fig. 5B.) The palpi in this genus do not have a
fixed length
a
may be observed in occasional specimens which have one paIpus distinctly
as
than the other.
longer
Rhipicephcdus, article is present and movably attached to 2. On the
In
plate on the inner side may be present or absent.
small
all species of Haemaphysalis known to the writer palpal article is absent
In
the between 2 and 3 is fused.
and articulation
A pair of pitted areas, usually depressed, the
on dorsum oJ; the
AREAS: POROSE
capituli, present in all females (of Ixodidae), absent in males, nymphs and
basis
larvae.
MEDIAN GROOVE: Ventral, longitudinal groove posterior to the
POSTANAL
anus.
GROOVES: A pair of dorsal body grooves outside the
POSTEROLATERAL
groove.
median
Pits in the surface of the exoskeleton, frequent on the scutum
PUNCTATIONS:
sometimes present on the basis capituli. The pit may or may not have a
and
in it, and in some the "floor" is level.
hair
An edge that extends, in contradistinction to a
margin that terminates
SALIENT:
by a
its parts by the deposit of nonchitinous substances in the exocuticula.
or
The sclerotized plate covering all or most of the dorsllra ha rna.les and
SCUTUM:
7
The median ventral mouth part which is immovably attached to the
HYPOSTOME:
or a retrograde extension, which, because of its shape, may be called
inner-edge,
there is a large triangular plate On the inner side while on the dorsum a
renter
rounded edge.
SCLEROTIZATION: The hardening, and incidentally,
darkening of the body wall
th anterior plate: i.n. fales, nymphs, and larvae.