22 Wisconsin Academy of Sciences, Arts and Letters. 



Coloration: Cephalothorax above, black covered with short white hairs, 

 sides dark brown with some irregular whitish spots and sparse yel- 

 lowish hairs, the lower margin being slightly darker; there are some 

 long yellow hairs on the eye-region. Clypeus dark brown mottled with 

 white, with a few yellowish hairs. Abdomen black covered with 

 short white hairs and longer yellowish hairs; near the base is a short 

 curved white line, posterior to which are two longitudinal rows of 

 white spots, four sjpots in each row; these are divided into two an- 

 terior and two posterior pairs, the four posterior spots being ob- 

 liquely elongated; on the posterior sides are two or three short 

 oblique white lines. Falces, mouth-parts, sternum, coxee and legs 

 dark brown. Venter black with short yellowish hairs. 



Habitat: Missouri. 



PHIDIPPUS RAUTERBERGII Nov. Sp. 

 Plate I, figure 8. Plate II, figure 8. 



9 . Total length 16 mm. Width of abdomen 7.3 mm. 



Cephalothorax: length 6.2; width 5.8; height 3.8. 



Legs 15.3, 11.3, 11.3, 15.2; patella and tibia of the first, 6. 4; patella and tibia 

 of the third, 4.4; patella and tibia of the fourth, 6; metatarsus and 

 tarsus of the fourth, 5.1. 



Cephalothorax nearly plane; ocular area much wider behind; anterior 

 lateral one-half as large as middle eyes, and separated from them by 

 a little more than one-half their own diameter; eyes of second row 

 more than twice as far from dorsal as from lateral eyes; third row 

 of eyes considerably narrower than the cephalothorax at that place; 

 clypeus one-third as high as the middle eyes. Maxillae wide, parallel, 

 rounded. Labium one-half as long as maxillae, but little longer than 

 wide, blunt at tip. Sternum oval, convex in front, less than twice 

 as long as wide, projecting but little between the anterior coxae, 

 which are separated by less than the width of the labium. Relative 



length of legs 4, 1, 2, 3; no patellary spines. 

 Coloration: Cephalothorax dark reddish brown, almost black in the eye- 

 region, with some short white hairs on the sides and between the 

 dorsal eyes. Abdomen mottled with brown and white, with two 

 black spots on the anterior portion, and one large irregular black spot 

 in the middle from which two black bands extend to the apex; in the 

 middle of the black spot is a lai-ge white spot, and on the black bands, 

 is a pair of smaller white spots; there are sometimes two white dots 

 nearer the aj)ex, and a w^hite spot on the inner side of each of the 

 black spots on the anterior part of the dorsum, while the space be- 

 tween the black bands is occupied by a series of white and brown 

 chevrons. Clypeus brown; palpus brown with three white rings; 



