Mr. R. I. Pocock on a new Trap-door Spider. 49 
EXPLANATION OF PLATE III. B. 
Fig. 1. Cheloctonus Jonesit, g. et sp.n. Nat. size. 
Fig. 2. Heterocharmus cinctipes, g. et sp.n. X 2. 
Fig. 2a. The same. Sternum and genital operculum. 
Fig, 2b. The same. Dentition of dactylus of palp. 
VI1.—Description of a new Trap-door Spider from Ceylon. 
By R. I. Pocock, of the British (Natural History) Museum. 
[Plate III. A.) 
Ccophleus cinctipes, gen. et sp. n. (PI. III. A.) 
Colour.—Cephalothorax castaneous, variegated with black ; 
ocular area black; mandibles castaneous; sternum, labium, 
cox, and femora clear ochraceous, the patella, tibia, and 
proximal tarsal segment with a fuscous band round the distal 
extremity; abdomen fuscous, variegated above and below 
with testaceous bands and spots. 
Cephalothorax longer than wide, its lateral margins convex, 
anterior margin straight, truncate, its posterior margin lightly 
concave. The fovea transverse or perhaps very lightly concave 
backwards. The area of the upper surface behind the fovea 
sloped at an angle of 45 degrees, the area in front of it very 
lightly convex longitudinally. No ocular tubercle; the area 
of the eyes much wider than long and following the convexity 
of the cephalic portion ; the median and the anterior lateral 
eyes forming a strongly procurved series, the median and 
posterior lateral forming a recurved series; the median eyes 
the largest and the highest, a horizontal line drawn from the 
base of each would touch but not cut the anterior lateral; the 
anterior laterals separated by a space which is about equal to 
twice the diameter of a median eye, the distance between the 
anterior and posterior lateral about equal to a diameter of a 
median eye, and that between the median eyes is a little less 
than a diameter of each ; the fourth pair of eyes are small, 
closely in contact with and on the same level as the posterior 
lateral, and are separated from the median of each side by a 
space about equal to their own diameter. 
Mandibles of moderate size, the anterior surface evenly 
curved from the base to the fang, smooth above, hairy in 
front, but not armed with teeth, fringed below with long 
reddish hairs, and armed internally with a row of denticles. 
Ann. & Mag. N. Hist. Ser. 6. Vol, ix. 4 
