428 
Psyche 
[December 
tribution and O. artemis is apparently restricted to the southwest. 
Oxyopes cougar has been found only in the southeast and O. lynx is 
from Marathon, Texas, far to the west of O. cougar. Better evidence 
for an east-west divergence influencing speciation is seen in the dis- 
tribution patterns of O. acleistus — O. occidens (Brady, 1964) 
and the lycosids Sosippus floridanus — S. calif ornicus (Brady, 1962). 
Only the effect of a. geographic divergence has been emphasized until 
now, but time must be given equal consideration. Successive waves 
of colonization would play an important role in the process of 
speciation. Populations moving into North America from a southern 
route at different times would further complicate the evolutionary 
picture. Intensive and widespread collecting in Mexico and Central 
America will undoubetedly give clues to the temporal sequence as 
well as elucidate the geographic patterns of speciation in the apollo 
species group. 
For collections which made this study possible I especially thank 
Dr. Donald C. Lowrie and Dr. W. D. Stockton of California State 
College at Long Beach, Dr. Howard V. Weems, Curator for the 
Florida State Collection of Arthropods, and Dr. Joseph A. Beatty 
of Southern Illinois University. These collections included the new 
species described here and the hypothesis concerning the effect of 
geographic movements on speciation of oxyopids was arrived at 
through a study of these collections. 
I also wish to thank Dr. H. W. Levi and Mrs. Lorna Levi, 
who were kind enough to read the original manuscript. National 
Science Foundation grant number GB- 13925 helped to defray ex- 
penses involved with this investigation. 
Oxyopes apollo Brady 
Oxyopes helms: Bryant, 1936, Psyche, 36(4): 92, fig. 7, S, not O. helius 
Chamberlin. 
Oxyopes apollo Brady, 1964, Bull. Mus. Comp. Zool., 131 (13): 467, figs. 
41, 42, 47-50, 72-75, $, $. Male holotype from Encino, Brooks Co., 
Texas in the American Museum of Natural History. 
Oxyopes floridanus Brady, 1964, Bull. Mus. Comp. Zool., 131 (13): 469, 
figs. 43, 44, 51, 76-79, 2, $. Male holotype from Volusia Co., Florida 
in the Museum of Comparative Zoology. NEW SYNONYMY 
Discussion. On the basis of a smaller retrolateral patellar apoph- 
ysis and a denser clothing of appressed white hair over the body 
and legs of Florida specimens, I (1964) recognized them as a dis- 
tinct species from Oxyopes apollo found from Tennessee to northern 
Mexico. Ernst Mayr (personal communication) pointed out at the 
time that the slight morphological differences might better be inter- 
preted as a response to geographic conditions. 
