220 ARANEIDEA. 
Pedo ornatus, sp. n. 
Adult female, length slightly over 33 lines. 
Cephalothoraw dull brownish-yellow, suffused with dusky-brown on the sides of the thorax, on which are also 
some darker converging lines, and covered with short whitish hairs. 
Legs dull brownish-yellow tinged with olive; the 4th pair have the tarsi and metatarsi suffused with dusky- 
brown and a darker annulus near the fore extremity of the tibie. 
Mazille, labium, and sternum yellow-brown. 
Abdomen on the upperside with a broad central longitudinal band tapering towards the hinder extremity, which 
ends in a transverse semicircular kind of fish-tail form ; this band has on each side at its beginning and 
at the middle an angular point and another at the extreme end ; it is of a yellowish hue strongly tinged 
with scarlet, especially at the middle and hinder part, and thickly clothed with short white hairs, The 
rest of the upperside is black, the sides yellow tinged with red and clothed with short white hairs, the 
lower part of the sides black ; a broad longitudinal brownish band occupies almost the whole of the 
underside. The plate covering the pedicle and spiracles yellow-brown ; the spiracles pale dull brownish ; 
genital aperture simple but characteristic. 
Hab. Mexico, Amula in Guerrero (H. H. Smith). 
This handsome spider seems to be nearly allied to 4graca, Sund., but the four 
spiracular openings (if I am right in believing these openings to be such) are quite 
abnormal, though it is at present not easy to determine their real value for systematic 
classification. 
HELVIDIUS%, gen. nov. (Drasside). 
Cephalothorax (of adult female) elongate-oval, much drawn out in front ; profile from the eyes to the hinder 
slope nearly level. 
Eyes in two slightly curved rows (the convexity of the curves directed forwards), widely separated from each 
other ; the anterior row rather the shortest and most curved, and its eyes the largest ; the posterior row 
almost straight. The four centrals form a quadrangle greatly longer than broad, and its anterior side 
shorter than the posterior. 
Legs not very long, subequal, 4, 1, 2, 3, rather strong, furnished with hairs and spines, the latter mostly on 
those of the third and fourth pairs; a rather dense scopula beneath the tarsi and metatarsi of the Ist and 
2nd pairs, a thinner one beneath the tarsi of the 3rd and 4th pairs. 
Falces normal, without teeth at their inner extremity. 
Mazille moderately long and strong, bent, broad and rounded at their extremity, and very deeply and 
obliquely impressed transversely in the middle ; articulation of the palpus rather less than halfway up from 
the base. 
Labium of moderate size, oblong, much longer than broad. 
Sternum oval, pointed at its posterior end. 
Abdomen cylindric-oval, truncated in front, obtusely pointed behind. Spinners of tolerable length, cylindric, 
inferior pair rather longest and strongest. 
This genus is nearly allied to Prosthesima, L. Koch, but differs in the greater 
separation of the two rows of eyes, the more drawn-out form of the cephalothorax, 
and the broader maxille, to which the palpi are articulated lower down, and also the 
stronger transverse impression of the maxille. 
* Nom. propr. 
