1964] 
Levi — Styposis and Pholcomma 
33 
specimen has been found in New Guinea, collected with a Berlese 
funnel in rain forest. The specimen is short-legged, pigmented and 
has eight eyes. It is the only Styposis specimen having habitat infor- 
mation. 
The two species described here from South America are placed in 
Pholcomma tentatively, awaiting the discovery of males and additional 
specimens. 
I would like to thank Dr. W. J. Gertsch of the American Museum 
of Natural History; Dr. A. Collart and J. Kekenbosch of the Institut 
Royal des Sciences Naturelles, Brussels; and Prof. M. Vachon of the 
Museum National d’Histoire Naturelle, Paris (MNHN), for the 
loan of collections; and Prof. M. Biraben, director of the Museo 
Argentino de Ciencias Naturales, Buenos Aires, for the loan of a 
specimen from the La Plata Museum. This investigation was sup- 
ported in part by Public Health Service Research Grant AI-01944, 
from the National Institute of Allergy and Infectious Diseases. 
Key to American Styposis species 
1 a. With six eyes (i960, fig. 1 ; Fig. 8) 2 
ib. With eight eyes or six eyes and pigment spots in place of anterior 
medians (i960, fig. 5, 10, 18, 24) 4 
2a. First patella-tibia less than one and one-half times carapace 
length; southern Brazil sells sp. n. 
2b. First patella-tibia more than twice carapace length 3 
3a. Male with first patella-tibia more than three times carapace 
length (Fig. 12); epigynum with a transverse knob (i960, 
fig. 3) \ Panama claus is Levi 
3b. Male with first patella-tibia two and one-half times carapace 
length; female unknown; Nicaragua nicaraguensis Levi 
4a. Abdomen wider than long (i960, fig. 10) ; Panama 
chickeringi Levi 
4b. Abdomen larger than wide or subspherical 5 
5a. Carapace sclerotized, with reticulate raised pattern 6 
5b. Carapace lightly sclerotized, smooth 7 
6a. Carapace widest behind middle, rounded behind ( 1959, fig. 18) ; 
Nicaragua to Venezuela jlavescens Simon 
6b. Carapace widest in middle, drawn out behind with a short stalk 
(i960, fig. 24) ; Panama scleropsis Levi 
7a. Posterior median eyes separated by their diameter (1959, fig. 
27) ; southwestern United States ajo Levi 
7b. Posterior median eyes their radius or less apart 8 
