1972] 
Brady — Sosippus 
33 
formed from these islands. When the islands were joined after the 
Pleistocene, the insular populations were effectively isolated ecolog- 
ically and ^productively. 
Acknowledgements 
For my initial investigation of Sosippus in 1962, I used the collec- 
tions of the Museum of Comparative Zoology, Harvard University, 
and those of the American Museum of Natural History, New York, 
supplied by Dr. Willis Gertsch. In addition, Dr. H. K. Wallace 
of the University of Florida and Dr. Joseph A. Beatty, presently of 
Southern Illinois University, supplied much needed specimens. 
The present study was aided by specimens kindly supplied by Dr. 
H. K. Wallace of the University of Florida and Dr. H. W. Levi 
of the Museum of Comparative Zoology. I express my appreciation 
to individuals and institutions for their aid in this investigation. 
Special thanks go to Jim Toothaker, formerly a student at Hope 
College, who aided considerably in the collection of data, and photog- 
raphy. A note of appreciation goes to Dr. Howard V. Weems, Jr. 
and the Bureau of Entomology, Florida Department of Agriculture 
for supplying the map of Florida. I also wish to thank Dr. H. W. 
Levi for reading critically the manuscript. National Science Founda- 
tion grant number GB-13925 helped to defray expenses of this re- 
search. 
Taxonomic Section 
Sosippus florid anus Simon 
Figures 10-13, 19-24* 34"38. Map 1. 
Sosippus floridanus Simon, 1898, Ann. Soc. Ent. Belgique, 42: 25. Female 
holotype from Florida in the Paris Museum. Roewer, 1954, Katalog der 
Araneae, 2: 314. Bonnet, 1958, Bibliographia Araneorum, 2(4): 4093. 
Roewer, 1959, Exploration du Parc National de l’Upemba, Araneae 
Lycosaeformia II (Lycosidae), P. 1004. Brady, 1962, Psyche, 69(3): 
151, figs. 1, 19, 20, 40-43, map 1. 
Discussion. For structural details, coloration, preliminary diagno- 
sis, and natural history refer to Brady (1962). Unlike the records 
for S. mimus , which represent several species, those listed in 1962 
for S. floridanus represent that species only. 
New records are listed below. 
Diagnosis. In addition to the features mentioned previously S. 
floridanus may also be distinguished from S. mimus by the number 
of posterior cheliceral teeth (Table 1). Sosippus floridanus is most 
similar to S. janus. It may be distinguished from the later species 
