1974] 
Valerio — Drymusa dinora 
287 
The three genera in the family Scytodidae share in common the 
small size of the permanent web and the specialized technique for 
subduing of prey. 
Conclusions 
The species should be considered very primitive since no wrapping 
is involved in the immobilization of prey. There seems to be a 
tendency for the economy of silk through the reduction of the perma- 
nent web and the overcoming of small prey without the use of trap 
webs. 
These behavioral observations, along with the morphological evi- 
dence, indicate that it might be best to keep the three genera 
( Drymusa , Loxosceles and Scytodes) within one family, the Scyto- 
didae. 
References 
Bristowe, W. S. 
1931. Spitting as a means of capturing prey by spiders. Ann. Mag. Nat. 
Hist. 10(8) : 469-471. 
Bucherl, W. 
1961. Aranhas do genero Loxosceles e loxoscelismo na America. 
Ciencia y Cultura 13 (4): 213-224. 
Eberhard, W. 
1967. Attack behavior of diguetid spiders and the origin of prey 
wrapping in spiders. Psyche 74(2): 173-181. 
Hite, J. M., Gladner, W. J., Lancaster, J. L., and Whitcomb, W. H. 
1966. Biology of the brown recluse spider. Bull. Agr. Exp. Sta. 711: 
1-26. 
K ASTON, B. J. 
1966. Evolution of the web. Nat. Hist. 75 (4): 27-32. 
Levi, H. W. 
1967. Predatory and sexual behavior of the spider Sicarius (Araneae: 
Sicariidae). Psyche 74(4): 320-330. 
McAlister, W. H. 
1960. The spitting habit in the spider Scytodes intricata Banks. Texas 
J. Sci. 22(1-2) : 17-20. 
Robinson, M. H. 
1969. Predatory behavior of Argiope argentata (Fabricius). Am. 
Zoologist 9: 161-173. 
Robinson, M. H., Mirik, H., and Turner, O. 
1969. The predatory behavior of some araneid spiders and the origin 
of immobilization wrapping. Psyche 76(4): 487-501. 
Shear, W. A. 
1969. Observations of the predatory behavior of the spider HyPochilus 
gertschi Hoffman. Psyche 76(4): 407-417. 
Valerio, C. E. 
1971. The spider genus Drymusa in the New World (Araneae, 
Scytodiadae) . Florida Ent. 54(2): 193-200. 
