18 Wisconsin Acadeimj of Sciences^ Arts and Letters. 



bands extend to the apex; the sides are creased (the abdomen is dis- 

 tended with eggs in the only specimen which we have of this species). 

 Clypeus and palpus dark rufus with long white hairs. Falces, mouth- 

 Ijarts, sternum and legs dark rufus, the inner edges of maxillae and 

 tip of labium being pale, and the legs having blackish bars. Venter 

 golden yellow with three iridescent dark bands. 

 Habitat: Pennsylvania. 



PHIDIPPUS ARIZONENSIS Peckham. 



Plate I, figure 10. Plate II, figure 10. 



Syn.: 1883. Attus ari5;o)?ejisis P., Descr. new or little known Attidse of 

 U. S., p. 13. 



$ . Total length 11 mm. Width of abdomen 3 mm. 



Cephalothorax: length 4.9; width 4.2; height 2. 



Legs 11.4, 9.9, 9.9, 10.3; patella and tibia of the first 4.9; patella and tibia 

 of the third 3.6; patella and tibia of the fourth 4.1; metarsus and tar- 

 sus of the fourth 3. 



Cephalic part with sides very widely rounded. 



Ocular area about one-half wider than long, this being relatively wider than 

 is usual in PMdippus. Anterior lateral one-half as wide as middle 

 eyes, and separated from them by their own diameter. Clypeus two- 

 thirds as high as middle eyes. Dorsal eyes nearly twice as far from 

 each other as from lateral borders. Maxillae jjarallel, enlarged at 

 extremity, with the outer corner sharp; labium one-half as long as 

 maxillge, rounded. Sternum as wide as imtermediate coxae. Ante- 

 rior coxae much stouter and longer than the others, and separated 

 by the width of the labium. There are sometimes iDatellary spines 

 on the four pairs. Abdomen long and slender, with its posterior face 

 truncated; spinnerets turned downward. 



Coloration: Cephalothorax velvety black, with two wide, white, lateral 

 bands beginning just before and below the dorsal eyes and almost 

 meeting in the middle of the thorax behind the depression. There is 

 a band of grayish brown hairs above the anterior eyes, and a tuft of 

 black hairs near each small median eye. Abdomen light brown; be- 

 hind the middle is a median, longitudinal velvety black band, the 

 truncated face, and the spinnerets being also black; in the middle of 

 the dorsum is a pair of indented dots, and a second ■ pair, 

 just in front of these, is very indistinct; at the apex are two 

 white spots one on each side of the black band; on each upper side of 

 the abdomen is a black line extending to the apex; the under sides 

 have wide Avhite bands, formed of hairs directed downwards, which 

 extend beneath on to the venter. The venter is velvety black, dark- 

 est behind, the white bands marking it off into a long triangle. Cly- 



