1947] 
Spiders from Mona Island 
95 
femur with white scales; legs, 4-3-1-2, pale, femora with 
basal and distal dark rings, more distinct on ventral side, 
posterior tibiae with basal and distal dark rings, scattered 
white iridescent scales on distal joints, spines, I pair, no 
patella spines but a long trichobothria at the tip, tibia, 
dorsal, 0, ventral, 2 distal, 1-lr, prolateral, 1, metatarsus, 
dorsal, 0, ventral, 2-2, II pair the same as I pair, III and 
IY pairs, patellae with prolateral and retrolateral spines, 
a dorsal basal spine on tibiae, tibiae spiny, metatarsi with 
three whorls of spines ; epigynum, the pair of spermatheca 
separated by almost two diameters, with smaller sacs just 
anterior which are separated by about a diameter, be- 
tween the two sacs a depressed area. 
Holotype ? Mona Island, August 1944 (Beatty). 
The genus Stoides was based by Simon on Prosthesima 
pygmcea Peckham from St. Vincent. Later the Peckhams 
added to the genus, Attus auratus Hentz, common in the 
southern part of the United States. It is questionable if 
the latter species belongs in the genus. The types of 
Prostheclina pygmcea, both male and female, were proba- 
bly returned to the British Museum and the co-types, an 
adult female and an immature specimen, retained by the 
Peckhams and are now in the Museum of Comparative 
Zoology collection. They are old and very much rubbed 
but probably once had hairs and scales on the ceplialo- 
thorax. In the female the second row of eyes is plainly 
midway between the first and third rows as stated by the 
Peckhams. Simon in the description of the genus, places 
the eyes of the second row nearer the third than to the 
first row. Stoides placida is congeneric with Stoides 
pygmcea (Peck.). It is slightly larger and has the ante- 
rior row of eyes more retreating so that the eyes are not 
visible from the dorsal side. 
Genus Sidusa Peckham 1895 
Sidusa mona spec. nov. 
Figures 5, 6 
Male. Length, 4.5 mm., ceph. 2.4 mm. long, 1.6 mm. 
wide, abd. 2.1 mm. 
CepJudothorax dark brown, ocular area covered with 
white scales with scattered dark bristles, the white scales 
