Superfamily Argiopoidea 



abdomen; these stripes are bowed outward at the posterior eyes 

 and inward on the thorax. The abdomen is black, marked with 

 white as follows: a basal band, a notched median band, and three 

 bars on each side. The first legs are the stoutest and are heavily 

 fringed with white, both above and below. In the female the 

 markings of the cephalothorax are much less distinct than in the 

 male, and gray hairs take the place of the black ones of the male, 

 the cephalothorax being nearly all gray; the clypeus is marked 

 with white and dark bands. The central band on the abdomen 

 is broken up into several spots or pairs of spots. The male 

 measures one fifth inch in length; the female, one fourth inch. 

 The species is widely distributed throughout the region east of 

 the Rocky Mountains. 



Pellenes borealis (P. bor-e-a'lis). — Two types of the male 

 have been described, the differences being due perhaps to the 

 markings of the one having been rubbed away. " In the one, the 

 cephalothorax, including the clypeus, is all black, and the abdomen 

 is black with a white basal and a white encircling band which 

 sends up two bars on each side, the anterior pair of which is con- 

 tinued in a straight transverse band across the back, in front of 

 the middle. This transverse band is connected with the base 

 by an indistinct stripe of white. On the posterior part of the back 

 is a good-sized central white spot, and behind this are two white 

 dots." " In the second male the cephalothorax has whitish bands 

 from the dorsal eyes to near the hind margin, where they turn 

 and pass forward along the lower side, and the upper sides are 

 covered with gray hairs. On the abdomen the spaces between 

 the bands and spots are filled with gray hairs. In front of the 

 transverse band are two narrow transverse black lines, one on 

 each side of the middle. Behind, instead of the white spot, there 

 is a band of tiny white chevrons bordered by short oblique black 

 bars, reaching the spinnerets. The white dots above the spin- 

 nerets are present." "In the female the ground colour of the 

 whole body is dark gray the effect being produced by a thin cover- 

 ing of gray hairs on a black integument. The cephalothorax 

 has light gray dorsal and marginal bands, and the abdomen 

 has light gray basal and transverse bands, the two being con- 

 nected by two light lines instead of by a solid band. Just behind 

 the transverse band are two fawn dots, and farther back are four 

 chevrons and two dots of the same colour. On the posterior sides 



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