162 L. L. Gaddy 



matured in late summer (see Table 1). The autumn totals in Table 1 are 

 artificially high because of the large number of Nephila clavipes, a visu- 

 ally and numerically dominant species. 



General observations on non-orb weavers indicate that Latrodectus 

 mactans is common under debris in dunes dominated by sea oats, 

 Uniola paniculata. Large males (7 mm body length) of L. mactans were 

 found in the maritime forest. Three species of the inquilinous Argyrodes 

 were found on the four islands: Argyrodes fictilium (Hentz) [-Rhom- 

 phaea lacerta (Walckenaer)], Argyrodes furcatus (O. P. -Cambridge), and 

 Argyrodes nephilae Taczanowski. Argyrodes nephilae was found in the 

 webs of Acanthepeira spp. and Tidarren sisyphoides, as well as those of 

 Nephila clavipes. 



Carico (1973) noted that the genus Dolomedes was absent from 

 "most islands off the coast of the southeastern United States," salt water 

 being a barrier to their dispersal. However, during my study Dolomedes 

 triton (Walckenaer) was found in a freshwater wetland less than 50 m 

 from the beach front. 



LITERATURE CITED 

 Barnes, Robert D. 1953. The ecological distribution of spiders in non-forested 



maritime communities at Beaufort, North Carolina. Ecol. Monogr. 



2i:315-377. 

 Barnes, Betty M., and R. D. Barnes. 1954. The ecology of the spiders of mari- 

 time drift lines. Ecology 55:25-35. 

 Berry, J. W. 1971. Seasonal distribution of common spiders in the North 



Carolina piedmont. Am. Midi. Nat. 55:526-531. 

 Carico, James E. 1973. The Nearctic species of the genus Dolomedes (Araneae, 



Pisauridae). Bull. Mus. Comp. Zool. 744:435-488. 

 Levi, Herbert W. 1971. The Diadematus group of the orb weaver genus Araneus 



north of Mexico (Araneae, Araneidae). Bull. Mus. Comp. Zool. 747:131-179. 

 Robinson, Michael H., and B. Robinson. 1973. Ecology and behavior of the 



giant wood spider Nephila maculata (Fabricius). Smithson. Contrib. Zool. 



749:1-76. 

 , and 1976. The ecology and behavior of Nephila maculata: a 



supplement. Smithson. Contrib. Zool. 275:1-22. 



Accepted 17 July 1981 



