218 ARANEIDEA. 
Hab. Mexico, Teapa (H. H. Smith); GuatemaLta (Sarg); Panama, Bugaba 
(Champion). 
The smaller examples are very similar in general appearance to S. parvula, but the 
species may be recognized at once from all forms known to me by the cresting fringes 
on the third pair of legs and also by the more widely curving, more spiraloid form of 
the apical palpal spine. 
29. Sidusa voluta, sp.n. (Tab. XVII. figg. 15, 15a, 2.) 
Type, 2, in coll. Godman & Salvin. Total length 4 millim. 
Carapace brown, margined with white scales, with a white spot between the lateral eyes and two or more 
spots in the region of the central stria. Cephalic area and eyes margined with black. Abdomen golden- 
buff, with a broad, black, anterior marginal band followed by a sinuous white line on each side, not 
united in the middle. On the posterior dorsal area are a pair of black spots on each side in connection 
with a circular parenthetical white bar on each side, often resolved into two spots (as in some varieties of 
S. albicincta). Ventral area pale, with olive-green speckles. Legs yellow, more or less distinctly annu- 
lated with brown. Tibia i. with lateral spines on the inner side; protarsus i. with lateral spines on both 
sides ; tibize iii. and iv. with a small dorsal basal spine. Vulva consisting of two circularly margined 
areas in contact along their inner margins, with four dark spermathecal spots in a transverse line about 
one diameter (variable) from the genital rima, the central pair circular and slightly larger, the lateral 
pair smaller and piriform, connected by a second curved internal duct; the first constitutes the 
margins of the disc on each side. 
Hab. Panama, Bugaba (Champion). 
The pattern on the abdomen of this small species is very similar to that of others of 
the group, especially S. albicincta and S. flavida, but the disposition of the ovaries and 
oviducts is very distinct. 
30. Sidusa sulphurea, sp.n. (Tab. XVII. figg. 16, lb a, ¢; 17,174, 6, 2.) 
Type ¢, gynetype 2, in coll. Godman & Salvin. Total length, ¢ 3, ? 4 millim. 
Carapace dark brown, clothed with pink iridescent scales, with a broad posterior marginal blotch of sulphur- 
yellow scales. Abdomen brown or black, with a pair of conspicuous sulphur-yellow shoulder-spots ; a 
pair of curved transverse yellow bars (sometimes separate in the centre, sometimes united and forming 
a single transverse bar) just 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 this ; sides spotted with dusky brown ; 
ventral area pale. Legs brown or yellow-brown ; i. and ii. rather darker. 
Cephalic area more globular than in most of the allied species. Small eyes midway between the laterals. 
Tibia i. and protarsus i. without lateral spines on either side; tibia iii. and iv. without a dorsal basal 
spine. Tibial spur of male palpus a little longer than the segment, sparsely truncate at the apex (but 
this is probably the result of accident, and in reality it is more or less aculeate). Bulb not developed 
basally, with a fine circularly curved spine at the apex, its point slightly recurved. 
Vulva characteristic, consisting of a pair of circular brown discs, in some cases in contact, in others slightly 
separate, situated on the posterior margin, with a pair of circularly-spiral ducts in front, forming two 
discs about the same size as the posterior pair, or slightly larger. 
Hab. Panama, Bugaba (Champion). 
