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
seen about the nests of the females. In October they lay their eggs and
all die before winter.
[Illustration: FIG. 405. Epeira displicata, enlarged four times.]
$Epeira displicata.$--Large females are quarter of an inch long, but
they are usually smaller. The cephalothorax and legs are brownish
yellow, without markings. The abdomen is oval and light yellow or
crimson, the latter color more common in the young. Sometimes there are
two white lines in the middle. At the sides of the hinder half of the
abdomen are three pairs of round black spots surrounded by lighter rings
(fig. 405). The under side of the abdomen is a little darker than the
upper side, with no distinct markings.
The male has the legs and cephalothorax darker brown than the female,
and the black spots on the abdomen larger and surrounded more distinctly
with white, which sometimes forms a stripe on each side. The tibiæ of
the second legs are not thickened. The webs are usually small and among
leaves.
[Illustration: FIG. 406. Web of Epeira globosa in the corner of a
doorway, showing the large tent at the top, from which a coarse thread
runs to the center of the round web.]
$Epeira globosa$ or $triaranea.$--Length about a quarter of an inch, the
male a third smaller. The abdomen is round and as wide as long, and in
the female large for the size of the spider. The front half of the
abdomen is nearly covered by four white, yellow, or pink spots, partly
united into a rectangular figure surrounded by an irregular black line
(fig. 407). The hinder half has three or four pairs of black spots. The
general color is light brownish yellow. The cephalothorax has a fine
middle line from the eyes to the dorsal groove and indistinct dark marks
at the sides of the head. The first and second legs have slightly darker
rings at the end and middle of each joint, the third and fourth pairs at
the ends of the joints only. The male is marked like the female and has
the tibia of the second legs slightly curved and thickened with large
spines on the inner side.
[Illustration: FIG. 407. Epeira globosa, enlarged four times.]
This spider makes a very large tent, out of which a strong thread runs
to the center of the round web (fig. 406). From the tent a loose and
irregular web extends downward, sometimes covering half of the round web
(fig. 406). Opposite the thread leading to the tent, a segment of the
round web is left open or partly open without any sticky threads.
[Illustration: FIG. 408. Epeira labyrinthea, enlarged four times.]
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