154 
Psyche 
[September 
surface. Femora gray on ventral surface, gray color continuing around 
leg segment at proximal and distal ends and toward the center as a 
pair of wide bands against a brownish yellow background clothed with 
white pubescence. Remaining leg segments brownish yellow, thickly 
clothed with black hair. 
Dorsum of abdomen with a reddish brown lanceolate mark at the 
base, enclosed by a wide black median stripe. This broad stripe with 
tufts of white hair forming two pairs of spots at indentations in the 
anterior end and with chevrons clothed with white hair crossing it at 
the posterior end. Lateral to dark median stripe are areas of brown 
with scattered black spots. Venter of abdomen grayish brown, pro- 
duced by black hair overlying brownish yellow integument. 
Male. The white spots and chevrons on the dorsum of the abdomen 
are not as conspicuous as in the female, otherwise the coloration and 
markings are much the same. 
Diagnosis. Sosippus floridanus is most similar to S. mimus. The 
form of the epigynum in these two species is similar but consistently 
different (compare Figs. 18, 19 to Figs. 13-17). The male palpi are 
much alike, but in S. floridanus the tarsal segment is usually only twice 
as long as wide, while in S. mimus the tarsal segment is usually more 
than twice as long as wide (compare Figs. 40-43 to Figs. 34, 35) . The 
most clear-cut difference between these two species is in the color pat- 
terns (compare Fig. 1 to Figs 2, 3), 
Natural Ilistory. Sosippus floridanus was collected from tubular 
webs leading under the trunks of Palmetto bushes and into the bases 
of tufts of high grass in areas of white, sandy soil. The webs were not 
extensively developed, the tubular portion usually being hidden and 
the sheet portion of the web consisting of radiating lines of silk forming 
a very loose meshwork. Additional specimens were collected from 
holes and ruts along a path of white sand that had once been cleared 
Explanation of Plate 11 
Figs. 23-24. Sosippus mexicanus Simon, $ from Acapulco de Juarez, 
Guerrero, Mexico, 1 Sep. 1940. 23. Genitalia, dorsal view. 24. Epigynum. 
Figs. 25-26. S. plutonus sp. n., 9 holotype from Tenango del Valle, 
Mexico, Mexico, 25-26 Aug. 1946. 25. Genitalia, dorsal view. 26. Epigynum. 
Figs. 27-28. S. calif ornicus Simon, $ from Brown’s Canyon, Baboquivari 
Mtns., Pima Co., Arizona, 9 Jun. 1952. 27. Genitalia, dorsal view. 28. Epigy- 
num. 
Figs. 29-30. S. agalenoidcs Banks, 9 syntype from Puntarenas, Costa Rica, 
1909. 29. Genitalia, dorsal view. 30. Epigynum. 
Figs. 31-32. S. michoacanus sp. n., 9 paratype from Tzararacua 11 km 
from Uruapan, Michoacan, Mexico, 14 Jun. 1948. 31. Genitalia, dorsal view. 
32. Epigynum. 
