1960] 
Levi — Spider genus Styposis 
19 
Styposis ajo, new species 
Figures 25-27 
Type. Female from 30 miles south of Ajo, Pima County, Arizona, 
January 4, 1941 (S. and D. Mulaik), in the American Museum of 
Natural History. 
Description. Colorless except for pigment around eyes. Diameter 
of anterior median eyes less than half that of others. Anterior median 
eyes two and one-half diameters apart, one diameter from laterals. 
Posterior median eyes one diameter apart, their radius from laterals. 
Abdomen oval, longer than wide. Total length 1.6 mm. Carapace, 
0.60 mm. long, 0.55 mm. wide. First femur, 0.78 mm.; patella and 
tibia, 0.88 mm. ; metatarsus, 0.62 mm. ; tarsus, 0.39 mm. Second 
patella and tibia, 0.67 mm.; third, 0.52 mm.; fourth, 0.83 mm. 
Diagnosis. This species differs from others by the shape of the 
epigynum (Fig. 26). It is the only member of the genus from north 
of Central America. 
