SIDUSA. 203 
area obtuse triangular, consisting of a pair of oval areas, their 
outer margins slightly sinuous, divided in the central line by a 
narrow septum, with a pair of large indistinct adjacent discs 
near the posterior margin. For further details, see Plate . . pallida, sp. n. 
4. Carapace brown, cephalic area darker. Legs yellow, only very 
indistinctly annulate. Abdomen pale ochreous-yellow, more 
or less distinctly mottled with brown and black spots, the 
most conspicuous being a small anterior central dorsal horse- 
shoe mark, a .~\-shaped mark at the middle, and a small, 
distinct, black, wedge-shaped mark just above the spinners. 
Vulval area* broad transverse-oval, but variable in form, con- 
sisting of a pair of oval or circular-oval discs, divided by a 
narrow septum. For further details, see Plate. . . . . . véttata, sp. n. 
ii. Tibie iii. and iv. without any dorsal basal spine. Tibia i. without 
any lateral spines on either side. 
1. Carapace brown; abdomen pale, with speckles and markings very 
much as in S. vittata; legs very distinctly annulated with black. 
Vulval area broad transverse-oval, the posterior margin sinuous, 
divided, though not very definitely, into a pair of oval areas, 
each with a pair of dark adjacent circular discs situated close 
to the genital rima, their inner margins forming a curving duct 
leading to black spots on the anterior portion of each area. . . penicillata. 
2. Carapace brown, with rose-pink iridescence, posterior lateral 
margin with a broad blotch of yellow scales. Abdomen brown, 
with a pair of yellow shoulder-spots, a pair of curved transverse 
yellow bars behind the middle, followed by two or three small 
central spots, a larger yellow spot just above the spinners and 
one on each side of it. Legs unicolorous yellow-brown, i. and 
ii. darker. Vulval area elongate-oval, with a pair of sometimes 
adjacent, sometimes slightly separate, dark circular discs situated 
on the genital rima, in front of each being a spiraloid duct 
of about the same diameter as the discs, connected with a central 
black spot 2. ee ee ee - oe ew ew ew we) SUlphuren. 
B. Protarsus i. with lateral spines on both sides, in addition to the two 
pairs beneath. 
i. Tibize iii. and iv. with a small dorsal basal spine on each. 
a. Tibia i. with one or more lateral spines on the inner side only. 
aa. Carapace without any broad lateral posterior marginal band of 
white or yellow scales. 
1. Abdomen golden-buff, with a broad black anterior marginal 
band, followed by a sinuous white line on each side not 
united in the middle; a pair of black posterior dorsal spots, 
* It is possible that the varieties of S. nigrina and S, vittata figured may really belong to a distinct species, 
but I hesitate to separate them on so few examples. 
2 pf 2 
