Figs. 1-4. Theridion attritum (Simon), female. 1. Dorsum of abdomen. 
2. Venter of abdomen. 3. Female genitalia, dorsal view. 4. Epigynum. 
Posterior eyes their diameter apart. Labium attached to sternum 
with indistinct seam. One tooth on anterior border of chelicerae. 
Legs quite short, abdomen suboval ( Fig. i ) . Epigynum has a cen- 
tral circular depression containing the openings (Fig. 4). Connecting 
ducts of epigynum coiled (Fig. 3). Total length, 2.2 mm. Carapace 
0.7 mm long, 0.7 mm wide. First femur, 0.8 mm, patella-tibia 1.0 
mm, metatarsus 0.7 mm, tarsus 0.4 mm. Second patella and tibia 
0.8 mm, third 0.5 mm, fourth 0.8 mm. 
This species is surprisingly similar to Theridion melanurum Hahn 
of Europe and Theridion varians Hahn. However, it is much 
smaller and the internal ducts differ in structure (Fig. 3). The 
ventral transverse band on the abdomen (Fig. 2) would be unusual 
in American and European Theridion species. 
References Cited 
Bonnet, P. 
1955. Bibliographia Araneorum 2(1), Toulouse. 
1959. Op. Cit. vol. 2(5). 
Levi, H. W. and L. R. Levi 
1962. The genera of the spider family Theridiidae. Bull. Mus . Comp . 
Zoo!. 127: 1-71. 
Simon, E. 
1908. Araneae in Michaelsen, W. and R. Hartmeyer, Die Fauna Siid- 
ivest-Australiens, 1(12). Fischer, Jena. 
Walckenaer, C. A. 
1802. Fauna Parisienne, Paris. 
1805. Tableau des Araneides, Paris. , 
