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HORN EXPEDITION—ARANEID.E. 
Isopeda. 
. Isopeda horni^ sp. n. (Fig. 12). 
Cephalothorax clai'k reddish-brown to black-brown, sparsely covered with grey, 
yellowish-brown, and black hairs intermixed; between the two rows of eyes a 
transverse stripe of white hair. Mandibles dark reddish-brown, with long thin 
hairs coloured as on the cephalothorax. Muscle at the base of the fang bright 
white. Hair fringe on the falces ; lip and maxilhe bright orange. Sternum black- 
brown, with reddish-brown and paler hairs round the margin. Lip and maxilhe 
dark red-brown, with paler edge. Abdomen yellowish-grey, with short down-lying 
brown and grey hairs intermixed. Behind the epigyne, which is bright brown, is 
a dark transverse stripe. Palpi bright red-brown, with long black-brown and grey 
hairs intermixed. Haunches red-brown, blacker on the front side ; femur reddish, 
with patches of white hairs giving a spotted appearance. Patella, tibia, metatarsus 
and tarsus clothed with yellow and white hairs. Long brown spines. Thick grey 
scopula on metatarsus and tarsus. Skin between the joints bright white, forming 
a contrast to the general brown colour of the legs. 
Cephalothorax equal in length to patella and tibia IV. ; 1 mm. longer than 
broad, rotund, square in front. Cephalic part well marked by side impressions, 
moderately convex and slightly arched, but Hat on the top, rising rather steeply at 
the rear and round the margin of the sides. A few long hairs, brown and grey, 
stand out from the margin of the clypeus. 
Eyes .—The front row straight, equal in size, half diameter apart and the same 
distance from the margin of the clypeus. Hinder row broader, likewise straight. 
The side eyes looking sideways and backwards, one-and-a-half diameters distant 
from front side eyes, all equal in size, one-and-a-half diameters apart, but rather 
smaller than the front eyes. Hind middle eyes two diameters from front middle 
eyes ; the two side eyes on a common protuberance. 
Mandibles. —Knee-formed at the base, thence perpendicular, divergent, 
conical ; fangs curved and long. 
Maxillejc. parallel, broad and powerful, rounded at the top and on the outer 
maigin, brown and shiny, with pale inner margin, sloping from the highest point 
inwards, thence perpendicular ; a thick coarse fringe. 
Lip broader than long, half the length of the maxillae, slightly rounded at the 
top, with a broad margin paler in colour and sloping towards the upper edge. 
