The Common Spiders of the United States — John Shaqi
The Common Spiders of the United StatesEmerton, J. H. (James Henry)
Science
The Common Spiders of the United States
Emerton, J. H. (James Henry)
Spiders -- United States
$Clubiona canadensis.$--Quarter of an inch long and without markings.
The upper eyes are nearly equidistant, as they are in _crassipalpis_,
but the legs and palpi are shorter. The male mandibles (fig. 56) are
much like those of _crassipalpis_, but have not so sharp a ridge on the
outer side. The male palpi (fig. 57) have the patella longer than wide
and the tibia wider than long, with two processes on the outer side. The
upper tibial process is a simple point extending along the outer side of
the tarsus for a quarter of its length. The under process is twice as
long, with a projecting corner at its base and running forward to a
sharp point, with a round notch halfway between the point and base. The
female has the head wider and the mandibles very much swelled in front
at the base (fig. 55). The fourth leg is longest and about as long as
the body.
[Illustration: FIGS. 58, 59. Clubiona rubra.--58, front of head and
mandibles of male. 59, palpus of male.]
$Clubiona rubra.$--Smaller than the other species, a sixth to a fifth of
an inch long. Cephalothorax light yellow brown, darker toward the front.
Abdomen pale in front and darkened with brownish red at the sides and
behind and along the middle of the back. The hind middle eyes are nearly
twice as far apart as they are from the lateral eyes. The fourth legs
are longest in both sexes, and there is little difference in the length
of the legs of the two sexes. The mandibles of the female are but little
swelled in front, not much more than those of the male, and the male
mandibles (fig. 58) are only a little narrowed at the ends. The male
palpi (fig. 59) have the tibia very much widened on the outer side, with
a short tooth in the middle and two larger short processes on the outer
side. The palpal organ has a large dark-colored process in the middle.
The epigynum is pointed behind, with a notch in the middle and two black
spots under the skin toward the front of the abdomen.
[Illustration: FIGS. 60, 61, 62. Clubiona ornata.--60, back of female
enlarged four times to show markings. 61, palpus of male. 62, front of
head and mandibles of male.]
Public-domain text, read in full here on John Shaqi.
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