104 ARANEIDEA. 
The vulva consists of a pair of stout chitinous spurs, connected in the form of a half-moon, at the anterior 
margin of the epigynal area, their points directed backwards. 
Hab. GuateMata (Sarg). 
4. Sillus curvispina, sp. n. (Tab. VII. figg. 26, 26a-c, 3.) 
Type, 3, in coll. Godman & Salvin. Total length 7 millim. 
3. Colour entirely pale orange-yellow, mandibles and anterior margin of carapace darker, abdomen paler. 
Posterior row of eyes straight. Eyes equal, equidistant, almost one diameter apart. Anterior row 
straight ; centrals much smaller, almost in contact, half a diameter from the laterals. Tibiee i. and ii. 
with 2—2 spines beneath, besides lateral spines ; protarsi i. and ii. with 2—2 spines beneath, besides lateral 
spines. Mandibles enlarged, not gibbous at the base beneath ; lower margin of fang-groove with three or 
four teeth and a slight rugulosity on the outer side, upper margin with three stout teeth, far removed 
from the base of the mandible. 
Palpus: tibia one-third longer than the patella, distinctly shorter than the tarsus. Tibial apophysis broad, 
concave in front, with a minute, curved, sharp spine directed forwards. The spine at the apex of the 
organs is more decidedly sinuous than in the species S. attiguus and S. longispina. 
Hab. Panama, Bugaba (Champion). 
5. Sillus longispina, sp. n. (Tab. VII. fig. 28, ¢ .) 
Type, ¢, in coll. Godman & Salvin. Total length 4 millim. 
Colour as in S. curvispina. Structure similar, except in the palpus and mandibles. 
Palpus: tibia one-third longer than the patella, shorter than the tarsus. The tibial apophysis is concave 
beneath and bilobate on the outer side; the spine at the apex of the bulb is long and straight, not 
curved or sinuous, directed obliquely across the apex of the tarsus beneath. Mandibles enlarged, not 
gibbous at the base beneath. Lower margin of fang-groove with five small tecth, upper with four larger 
ones. 
Hab. GuatTeMALa (Sarg). 
6. Sillus placens. 
Clubiona placens, O. P.-Cambr. Biol. Centr.-Amer., Arachn, Aran. 1. p. 195 (¢)’. 
Type, d, in coll. Godman & Salvin. Total length 3°5 millim. 
Hab. Panama (Sarg '). 
WULFILA. 
Wulfila, O. P.-Cambridge, Biol. Centr.-Amer., Arachn. Aran. i. p. 158 (1895). 
Type W. pallidus, O. P.-Cambr. Mexico. 
In this genus the central anterior eyes are much smaller than the laterals, and the 
spiracular rima is situated approximately in the middle of the ventral area, or slightly 
before it. It differs from Teudis and Stllus in its much more slender legs, and in the 
presence of three pairs of spines beneath the anterior protarsi; and from Cragus and 
Macrophyes in the fact that the spines on the legs of the latter are longer, more numer- 
ous, and not in pairs; otherwise Wu/fila is very closely allied to these last-mentioned 
genera. The chitinous covering of the lung-sacs is strongly developed, protuberant. 
The characters of the females of this genus do not admit of tabulation, specimens of 
this sex being separable only by the form of the vulva. 
