14 
Psyche 
[March - June 
usual position, difficult to discern and could not be found in some 
species. 
Female genitalia with two seminal receptacles. Male palpus weak- 
ly sclerotized, parts translucent and difficult to delineate. Bulb twisted 
so that embolus faces the outside (and is partly hidden by the' cym- 
bium), and median apophysis faces ventrally (Figs. 6, 9, 16, 19). 
Median apophysis (M in Figs. 8, 14, 15, 20) a very large structure, 
functional, its end lying against the paracymbial hook (Fig. 14) at 
the distal end of the cymbium. Radix (R) present. The large struc- 
ture supporting the embolus in S. chickeringi and S. flavescens prob- 
ably is the radix (R in Figs. 14, 15, 20) . 
Six species are known from Central America and northern South 
America and one from the southwestern United States. 
Styposis differs from Archerius by lacking the large colulus and by 
being less sclerotized. It differs from Sphyrotinus by having the anter- 
ior median eyes reduced in size or absent and by the unusual position 
of the bulb in the palpal cymbium. 
Styposis flavescens Simon 
Figures 7, 18-22 
Styposis flavescens Simon, 1894, Histoire Naturelle des Araignees, 1:592. 
Fig. 599. 9 type from Venezuela, in the Museum National d’Histoire Natur- 
elle, Paris, examined. 
Description. Carapace, sternum brown. Legs light brown. Abdo- 
men whitish, without pigment. Carapace longer than wide. Cephalo- 
thorax heavily sclerotized ; carapace and sternum with a net-like 
sclerotized pattern (Fig. 18). Diameter of anterior median eyes 
about equal to the radius of posterior medians. Anterior median 
e3^es their radius apart, their radius from laterals. Posterior median 
eyes one-third diameter apart, two-thirds from laterals. Abdomen 
suboval in shape. Total length of female 1.4 mm. Carapace, 0.68 
mm. long, 0.53 mm wide. First femur, 0.89 mm.; patella and tibia, 
0.92 mm.; metatarsus 0.62 mm; tarsus, 0.41 mm. Second patella and 
tibia, 0.68 mm.; third, 0.47 mm.; fourth, 0.68 mm. Total length of 
male 1.5 mm. Carapace 0.75 mm. long, 0.56 mm. wide. First femur, 
1.04 mm.; patella and tibia, 1.22 mm.; metatarsus, 0.81 mm.; tarsus, 
0.47 mm. Second patella and tibia, 0.83 mm.; third, 0.59 mm.; 
fourth, 0.70 mm. The epigynum (Figs. 7, 22) has a slight median 
projection. The palpus (Figs. 19, 20) has a median apophysis with 
two projecting prongs, easily seen in lateral view. (Fig. 7 was made 
from the type, Figs. 18-22 from specimens collected in Nicaragua). 
