44 Wisconsin Academy of Sciences, Arts and Letters. 



except a white line just under the eyes, and a fringe of white hairs. 

 Abdomen with a narrow central longitudinal brown band, on either 

 side of which the dorsum is black; in the center of the dorsum are 

 two transverse white bars or large spots, one on each side, in front of 

 which are one or two dots on each side, while behind them, in the 

 middle line are two indistinct Kght dots, one behind the other; just 

 above the apex are two white bars corresponding to the middle bars 

 but narrower; the lower sides are light brown or gray, and the base is 

 sometimes whitish. Falces, mouthparts and coxse dark brown. 

 Sternum black. Venter gray with two longitudinal brown bands. 

 Palpi and legs dark brown, g . Cephalothorax gray with a white 

 cross behind dorsal eyes and a white band low on each side. Clypeus 

 covered with white hairs. Abdomen gray at base, white at apex; 

 near the base and close together are two large black spots, in the mid- 

 dle of each of which is a white dot; continuous with these sj)ots are 

 two narrow black bands, which curve outward and then inward, en- 

 larging into two posterior spots, which are joined in the middle by a 

 short black band which curves forward; the central region thus en- 

 closed is white with a dark spot in the middle; behind, in the middle 

 line and decreasing in size as they approach the apex, are several short 

 transverse black bands. These markings are somewhat variable but 

 the species is easily distinguished. Palpus pale with white hairs. 

 Legs hght brown with dark rings. Otherwise like $ . 

 Habitat: Wisconsin, Michigan. 



ATTUS IMPERIALIS Nov. Sp. 



Plate III, figures 31, 31a. 



i . Total length 4 mm. Width of abdomen 3 mm. 



Cephalothorax: length 2; width 1.7; height 1.2. 



Legs 4.8, 3.1, 2.8, 4.2; patella and tibia of the first, 2; patella and tibia of 

 the third, 9; patella and tibia of the fourth, 1.6; metatarsus and tarsus 

 of the fourth, 1.3. 



Cephalothorax moderately high, slightly convex, a little dilated behind 

 dorsal eyes, with sides nearlj^ vertical; cephalic part sliglitly inchned; 

 thoracic part slanting gradually in the first two-thirds, then ab- 

 ruptly. Ocular area occupying a httle less than one-half cephalo- 

 thorax, one-third wider than long, wider behind than in front. First 

 row of eyes very slightly curved; middle eyes sub-touching; lateral 

 rather more than one-half as large as middle eyes, separated from 

 them by two-thirds their own diameter; eyes of second row very 

 slightly nearer lateral than dorsal eyes ; dorsal as large as lateral 

 eyes, further from each other than from lateral borders, foi'ming a 

 row as wide as the cephalothorax at that place. Clypeus one-fourth 



