CASTIANEIRA. 287 
Sternum like the cephalothorax in colour, indistinctly radiated with a lighter hue, and furnished with short 
white and longer dark lines. 
Abdomen oval; upperside black, with a tapering, longitudinal, central band or stripe on the fore part, ending 
_ ina sharp point, and covered with white hairs; at its fore extremity this band is deeply and sharply 
notched on each side, having on each side two prominent angular points; following close to its posterior 
extremity is a longitudinal series of three short, transverse, united, angular, white bars, and a horseshoe- 
shaped white line or stripe partly encircling the abdomen just above the spinners; this last (horseshoe) 
stripe seems to be characteristic, in some form or other, of most of the species known to me of the genus. 
The sides of the abdomen are similar in colour to the upperside, softening into the yellow-brown hue of 
the underside, the largest part of which, in a somewhat quadrate form, is covered with short grey hairs. 
On each side of the abdomen at the fore extremity are two not quite united pale patches, covered with 
white hairs, in a longitudinal line. The spiracular plates and the adjacent surface are of a homogeneous 
nature, forming a socket to the connecting pedicle, of a yellow-brown colour. Spinners yellow-brown. 
The genital aperture has the same general form as other allied species, but is characteristically distinct. 
The grey and white hairs on this spider appear to be all plumose. 
Hab. Mexico, Amula in Guerrero (H. H. Smith). 
Castianeira luctuosa, sp. n. 
Adult female, length slightly over 3 lines. 
General form and structure normal. 
Cephalothorax deep yellow-brown, thinly clothed with white hairs, 
Eyes. General position normal, but the length of the anterior side of the central quadrangle appears to be equal 
to that of the posterior side; and the eyes forming the latter are distinctly further from each other than 
from the laterals of the same row. 
Legs 4,1, 2,3; femora dark yellow-brown, thinly clothed with grey hairs; the rest of the first and second 
pairs yellow; the tibice of the fourth pair have a yellowish annulus at each extremity clothed with white 
hairs; the metatarsi deeper brown than the femora, and the tarsi dull pale yellow-brown. The tibie, 
tarsi, and metetarsi of the third pair are yellow-brown. The spines beneath the tibiew of the first pair 
are 5 in number (2, 2, 1), and beneath those of the second pair 4—two on each side, though not quite 
in pairs ; those beneath the first and second tibie are in two pairs. 
Falces strong, convexly prominent in front, and similar in colour to the cephalothorax. 
Mawille and labiwm yellow-brown, tipped with yellowish-white. 
Sternum yellow-brown, palest along the middle. 
Abdomen oval, broadest towards the hinder part. Upperside black, with a series of four transverse pale bars 
or markings on the fore half clothed with white hairs ; the two foremost are broad and just connected at 
the middle, the second the longer of the two, both being nearly equal in length to the breadth of the 
abdomen at that part; next behind these is a much slenderer bar and somewhat curved, the convexity of 
the curve directed backwards, or, rather, it is composed of two slightly curved short bars almost united 
at their inner ends; immediately behind this, again, is a similar but much longer, slightly curved trans- 
verse bar ‘or stripe, of which the inner ends unite in asmall angular point in the middle directed forwards, 
and the outer ends fall over the side of the abdomen and unite with a strong, oblong, white spot or patch 
of the same kind ; in front of this, on each side of the fore extremity, is a somewhat triangular patch of a 
similar kind. Just above the spinners the end of the abdomen is partly encircled by a horseshoe-shaped 
bar, very similar to that of some other species, and halfway between it and the long transverse bar at the 
middle of the abdomen are two small white spots wide apart in a transverse line. Spinners dull yellow- 
brown, tipped with paler. Underside marked by an oblong area broadest in front (occupying nearly the 
whole of it), and of a warm yellow-brownish hue. Genital aperture much resembling that of others of the 
genus, but still characteristically different. The spiracular plates and socket of pedicle are of a slightly 
reddish-yellow-brown colour. As in other species, the white hairs are plumose. 
Hab. Mexico, Amula in Guerrero (H. H. Smith). 
