298 
Psyche 
[September 
long, 5.0 mm wide. First femur, 5.8 mm; patella and tibia, 8.0 mm; 
metatarsus, 4.7 mm; tarsus, 1.6 mm. Second patella and tibia, 6.9 
mm; third, 4.0 mm; fourth, 6.5 mm. 
Male from Arizona. Carapace and sternum light brown. Legs 
only indistinctly banded. Dorsum of abdomen evenly covered with 
white pigment and tiny black spots at the base of setae. Venter with 
area between genital groove and epigynum white. Carapace with a 
deep longitudinal groove. Eye sizes almost like those of female. 
Anterior median eyes slightly more than their diameter apart, pos- 
terior median eyes slightly more than their diameter apart. Abdomen 
subtriangular with a distinct posterior hump. Total length 11 mm. 
Carapace 5.8 mm long, 4.4 mm wide. First femur, 5.8 mm; patella 
and tibia, 7.2 mm; metatarsus, 4.7 mm; tarsus, 1.4 mm. Second 
patella and tibia, 6.4 mm; third, 3.6 mm; fourth, 5.4 mm. 
Variation. Some specimens have the cephalothorax red-brown and 
abdomen almost black ; other have the cephalothorax yellowish-brown 
and the abdomen white or yellow-brown. The abdomen may have 
a folium-like patch (Fig. 42) or may be almost completely white 
as in a specimen from Peru (Fig. 44). The posterior dorsal hump 
is distinct in all specimens. But there may be two posterior humps 
in a row and other humps. The keel of the epigynum scape is less 
distinct in some specimens from Central and South America but the 
shape of the base of the epigynum stays about the same. No speci- 
mens were seen in which the scape was torn off, but in some the tip 
had broken off. Northern males, from Mexico and the United 
States, may have only two macrosetae on the fourth coxa while those 
examined from Central and South America all had three or four 
macrosetae. Females ranged from 12-16 mm in total length, males 
from 8-12 mm in total length. 
Diagnosis. The keel of the epigynal scape (Fig. 37), the large 
projecting median sclerite of the base of the epigynum (Figs. 38-40), 
and the cylindrical embolus of the male palp (Fig. 36) and usually 
the macrosetae across coxa (Fig. 48) and the large posterior hump 
of the abdomen (Figs. 45-47) can be used to separate specimens 
of E. edax from those of E. fuliginea. 
Distribution. From southern Texas, Arizona and southern Cali- 
fornia to Peru and Brazil (Map 3). 
Eriophora nephiloides (O. P. -Cambridge) 
Map 4; Figures ib, 49-58 
Epeira nephiloides O. P.-Cambridge, 1889, Biologia Centrali-Americana, 
Araneidea, vol. 1, p. 32, pi. 7, figs. 1, 2, $. Female syntypes from Panzos, 
