1971] 
Levi — Orb-W eaver Genera 
255 
Figs. 99-106. Hypsosinga alberta sp. n., female. Figs. 99-103. Epigynum. 
99. Subventral, with one scale. 100. Ventral with scales. 101. Dorsal, cleared. 
102. Ventral. 103. Posterior. 104. Left scale, dorsal view. 105. Face. 106. 
Dorsal. 
Size Indicators : 0.1 mm, except Fig. 106, 1 mm. 
Description. Female. Carapace yellow, slightly reddish on sides. 
Sternum brown. Legs yellow. Dorsum of abdomen marked as in 
other Jlypsosinga (Fig. 106), often entirely black. Venter black 
with one light band on each side. Posterior median eyes 1.2 diameters 
of anteriors, laterals 0.8 diameter of anterior medians. Anterior 
median eyes one and one-half diameters apart, two diameters from 
laterals. The posterior row is slightly recurved as seen from above. 
The clypeus is one and one-half to two diameters of the anterior 
median eyes. Total length 5.0 mm. Carapace 1.7 mm long, 1.6 mm 
wide. First femur, 1.5 mm; patella and tibia, 1.8 mm; metatarsus, 
1. 1 mm; tarsus, 0.7 mm. Second patella and tibia, 1.6 mm; third, 
t.i mm; fourth, 1.6 mm. 
Diagnosis. The female Hypsosinga alberta can be distinguished 
from other species by its lack of a raised median sclerotized septum 
(Fig. 102) and, if mated, by the heavily sclerotized scales covering 
the epigynum (Fig. 100). 
