100 
ARANEIDEA. 
ARACHOSIA, Cambridge. 
Arachosia puta, sp. n. 
Adult female, length 5 lines. 
Cephalothoraa considerably longer than broad ; lateral margins at the caput moderately constricted, and the 
anterior margin squarely truncated. It is of a yellow colour, with regular, rather tapering, converging, 
dull reddish-yellow lateral stripes on the thorax, and from each of the hind central eyes a slender dark 
red-brown line runs backwards, the two meeting in a fine point just above the posterior margin of the 
thorax ; there is also a similar but rather broken line running round a little way above the margins of 
the thorax. The height of the clypeus is rather more than equal to the diameter of one of the anterior 
rows of eyes. 
The eyes are small and almost of equal size, seated on black spots, in two transverse rows, the anterior row 
The 
shortest and nearly straight, the posterior row strongly curved, the convexity of the curve directed 
backwards. The interval between the eyes of the fore central pair is equal to about a diameter, each 
being almost contiguous to the fore lateral eye on its side. The interval between the eyes of each 
lateral pair is about two diameters, and those of the hind central pair are considerably further from each 
other than each is from the hind lateral eye on its side. 
legs are moderate in length and strength, and do not differ very greatly in length, 4, 3,1, 2. They are 
ofa yellow colour, furnished with long spines (these are so much injured that it is not possible to ascertain 
their disposition and numbers accurately). There is a thin scopula beneath the tarsi and a portion of the 
metatarsi, and a claw-tuft beneath the two terminal tarsal claws. At the hinder extremity of the tibie 
and metatarsi of the first two pairs are two or three small red-brown elongate spots. 
Falces moderately long, straight, vertical, and like the cephalothorax in colour. 
Maxille moderately long, straight, sides parallel, rounded at the extremities, similar to the falces in colour. 
Labium short, somewhat oval, yellow, with a dusky curved marking on it. 
Sternum rather narrow, oval, yellow. 
Abdomen oval, cream-white, with a short red-brown dash at the middle of the fore margin of the upperside 
and two other similar dashes in a transverse line at the middle, also a few minute spots of red-brown on 
the lateral margins. The genital aperture is of a very characteristic form, and rather more than' 
halfway between it and the spinners is a transverse slit, no doubt leading to a tracheal or breathing- 
organ. 
Hab. Panama, Volcan de Chiriqui (Champion). 
CTENUS, Walckenaer. 
Ctenus mordicus, sp. n. 
Adult male, length 9 lines; adult female, length 12 lines. 
Cephalothorax of male longer than broad and of normal form ; the lateral marginal constrictions at the caput 
tolerably strong ; the anterior margin of the caput squarely truncated ; yellow-brown in colour, covered 
with greyish pubescence ; a broad central longitudinal band slightly darker than the rest, and margined 
with a deeper reddish-brown broken stripe, reaches from the eyes to the hinder margin; the sides also 
have a dusky broadish marginal border. The clypeus is low, and its middle portion, including also the 
four central eyes, is red-brown, and a stripe of the same hue runs obliquely downwards from each lateral 
pair of eyes to the corner of the lower anterior margin of the caput. The space between the four central 
eyes is clothed with coarse yellowish-grey hairs. 
The eyes are in the ordinary position; four form a central quadrangle, whose posterior side, formed by the 
largest eyes of the eight, is the longest, the interval between these two eyes being no more than half a 
diameter ; the fore central pair are not more than half the size of the hind centrals, from which, and the 
lower margin of the clypeus, they are separated by a very narrow but about equal interval. The hind 
lateral eyes are large, but not so large as the hind centrals, seated on strong tubercles and directed out- 
