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
$Pardosa lapidicina.$--Four-fifths of an inch long and with long legs,
the fourth pair three-quarters of an inch long. The color is black, the
whole body being covered with black hairs that obscure the few light
markings (fig. 186). When looked at closely, especially after being wet,
the legs appear a little lighter colored toward the ends, and the
femora faintly marked with light rings. In the middle of the
cephalothorax there is a large light spot, widest just in front of the
dorsal groove, and at the sides are rows of irregular light spots. On
the abdomen are three or four pairs of light spots near together in the
front half, and behind are two rows of spots meeting over the
spinnerets. On the under side the color is a lighter gray than on the
back. The color, as in all spiders, varies according to age, the young
and freshly molted having a deeper black color, while older ones are
gray. The epigynum is shown in the figure (fig. 188), and is quite
constant in shape. It distinguishes this species from _greenlandica_
(fig. 189), for which it is most likely to be mistaken. The male differs
little from the female. This spider lives among gray stones in the
hottest and driest places from Connecticut to Labrador.
[Illustration: FIGS. 189, 190. Pardosa greenlandica.--189, female
enlarged four times. 190, epigynum.]
$Pardosa albomaculata$ or $greenlandica.$--This species resembles
_lapidicina_ (fig. 186), but is a little larger and not quite as long
legged. It has longer hairs and is marked with bright white spots on a
black ground. There are two rows of white spots on the abdomen, and
others along the sides of the cephalothorax and on the legs (fig. 189).
Wet in alcohol it shows similar irregular markings on the abdomen as
_lapidicina_, but the light spots on the thorax are smaller, the middle
one extending forward only to the dorsal groove. The epigynum (fig. 190)
is large and distinct. Its outline has been compared to that of a
decanter, narrow in front and rounded out at the sides behind. There is
a long narrow middle lobe, generally widened at the end, but varying
much in shape. At the front end of the epigynum are two small
depressions. It resembles the epigynum of _glacialis_ (fig. 192), but is
always longer and narrower and has the middle lobe straighter and more
distinct. White Mountains, on bare stones. Rocky Mountains, Canada, and
Greenland.
[Illustration: FIGS. 191, 192. Pardosa glacialis.--191, Female enlarged
four times. 192, epigynum.]
Public-domain text, read in full here on John Shaqi.
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