SIDUSA. 199 
clothed with azure-blue scales. Protarsi and _ tarsi 
iil, and iv. entirely yellow. Tibis iii. and iv. with a 
dorsal basal spine . . . . flavida, sp. n. 
BB. Apical spine of bulb quite short and only slightly curved. 
(Tibial spur long and slender. Abdomen with a curved 
shoulder-spot of white hairs on each side anteriorly ; 
sides of dorsal area black, apical half with a central 
dorsal white band, with four or five dusky chevrons; 
sides conspicuously white. Central spinners white, 
anterior and posterior pairs black. Legs and mandibles 
not blue or iridescent, but brown. Legs iii. and iv. 
yellow, suffused with brown. Tibie i. and ii. cylin- 
drical, not compressed ; iii. and iv. with a small dorsal 
basal spine.]. 2. 2... wee . brevispina, sp. n. 
66. Clypeus clothed and anterior central eyes encircled with dull 
orange scales. ['Tibial spur very long and slender, divergent, 
filiform, sometimes aculeate, but more often furculate at the 
apex ; apical spine and bulb not widely curved at its base, but 
similar to that of S. conspecta and S. albicincta. Tibia ii. 
blue, iridescent, but only in some examples. Abdomen 
clothed with golden-green scales, with a black anterior 
submarginal band, followed by a narrow white band, with a 
short white transverse spot on each side behind the middle 
and a smaller white spot on each side, nearer together, in 
front of the anal tubercle. Legs unicolorous brown or 
dull yellow. Tibie i. and ii. not compressed ; iii. and iv. 
with i a small dorsal basal spine.] . 2. . 2... . . lutea, sp. n. 
ii, Legs i., ii., and iii. with fringing hairs, those of the latter more 
decidedly crested. Apical spine of bulb much more widely 
curved from its base and more spiraloid. [Tibial spur very long 
and slender, often widely divergent, filiform, and aculeate at its 
apex. Tibia and protarsus iii., sometimes also i. and ii., blue, 
iridescent, the former compressed dorsally and on the sides. 
Abdomen variable, with or without a large central anterior dorsal 
spot of yellow hairs, always with a short transverse white spot 
or bar just beyond the middle, and another smaller white 
spot on each side, nearer together, towards the anal tubercle. 
Carapace with a broad white marginal band on the posterior 
half, besides other white spots of scales (usually more or less 
rubbed off) on the cephalic area. Tibiz iii. and iv. with a 
dorsal basal spine.]. . 2. 2 1 1 1. 1. we ee spiralis, sp. n. 
II. Legs i., ii., and iii. not fringed with hairs. 
aaa. Legs i. and ii. thickly clothed with black hairs. [Tibial spur 
long and slender, apical spine spiraloid. Carapace with a white 
