212 ARANEIDEA. 
8. Sidusa dentichelis, sp.n. (Tab. XV. figg. 13, 134, 4, 6.) 
Type, ¢, in coll. Godman & Salvin. Total length 7 millim. 
Hab. Mexico, Amula in Guerrero (H. H. Smith). 
This species is in general appearance very similar to S. minuta and S. penicillata, 
but may be recognized by the tooth on the inner excavated margin of the mandibles 
and the cusp on the outer margin of the widely curved apical palpal spine. 
9. Sidusa minuta, sp. n. (Tab. XV. figg. 14, 14 a, 4, ¢ .) 
Type, d, in coll. Godman & Salvin. Total length 5 millim. . 
Carapace clothed with white and golden-orange hairs and scales. Abdomen with a central dorsal wedge-shaped 
dark band, and clothed with golden-orange scales and hairs, and with dull white hairs on the sides. 
Hab. Muxtco, Omilteme in Guerrero (H. H. Smith). 
Recognizable by the excavate mandibles, and the more widely sweeping spiraloid 
curve of the spine at the apex of the bulb. 
10. Sidusa nigropicta, sp.n. (Tab. XV. figg. 15, 15 a-d, 3.) 
Type, ¢, in coll. Godman & Salvin. Total length 4 millim. 
Carapace dark brown, cephalic area almost black, thoracic area with a pale lateral, indistinctly defined band 
on each side, extending from behind the posterior lateral eyes to the posterior margin. Abdomen dull 
white, or possibly pale yellow, thinly speckled with brown, with a central longitudinal black band, 
broader in front, narrowing to the spinners, with two slight pointed offshoots on each side; lateral 
margins black, lower lateral and ventral areas pale. Sternum dull yellow. Palpi brown. Legs yellow, 
i. and ii. darker, often quite brown: femora iii. and iv. with a basal and apical dark annular spot, the 
tibia and protarsus also with a dusky basal annular spot. 
Small eyes distinctly nearer the posterior laterals. Tibia and protarsus i. with lateral spines on the inner side 
only. Tibie iii. and iv. with a small dorsal basal spine. Palpal bulb enlarged, protuberant at the base, 
not narrowed, but very similar to that of other species of the group ; apical spine stout, forming an almost 
complete circle; tibial spur long, slender, pointed, slightly serrate beneath towards the apex. Sternum 
distinctly longer than broad. Mandibles weak, not developed, with a single broad tooth on the inferior 
margin and two small subsimilar teeth on the upper. 
Hab. Panama, Bugaba (Champion). 
11. Sidusa penicillata, sp.n. (Tab. XVI. figg. 5,5 a,b, 5; 6, 6a-c, 2.) 
Type d, gynetype Q, in coll. Godman & Salvin. Total length, ¢ 7, 2 8 millim. 
¢. Carapace clothed with brown, white, or orange hairs. Abdomen whitish-yellow, with a broad, central, 
dorsal, brown, dentated band, consisting of two pairs of dark spots, more or less connected, and an apical 
triangular black spot. The first two pairs of spots are often resolved into a pair of /\-shaped black 
marks. Along the sides are a pair of pale spots, with a pencil of white hairs issuing from them, while 
on each side of the apical dark spot is a white spot, these often coalescing to form a single white, semi- 
circular, pale bar, entirely embracing the dark spot posteriorly. Ventral area dark brown or speckled 
with black. Clypeus and base of mandibles clothed with white hairs. Posterior margins of anterior 
central eyes encircled with orange hairs. 
Q. The coloration is practically the same as in the male. The form of the vulva is shown on the Plate. The 
