neio Oriental Opiliones. 287 



Oncopus alticepSj sp. n. 



Colour deep blackish brown, carapace and mandibles paler ; 

 extremities of the leg-segments and the entire tarsus pale. 



Carapace very high, abruptly elevated behind at its junction 

 with the abdomen, strongly rounded from side to side, without 

 any broad elevated interocular prominence such as is seen in 

 0. Ho$e{. 



Mandibles very strong, the basal segment suddenly raised 

 at the base and projecting forwards to a point nearly on a 

 level with the tip of the femur of the palp, which curves 

 round it, armed externally below with a spiniform tooth, 

 only a small portion of the second segment visible from 

 above. 



The palp with the tarsus stouter than in Ilosei, the claw 

 thick, short, tarsitorm, and forming a small pincer with a 

 short ])rocess from the apex of the tarsus. 



Z/f^s as in Hoaei ; the coxa? of the second, however, on 

 each side of the middle line are thickened and raised into a 

 warty eminence, which projects forwards and terminates in a 

 black bilobed maxillary process, and there are no forwardly- 

 directed processes on the inner extremities of the coxse of the 

 third legs. 



Genital ])late broader as compared with its length than in 

 liosei. 



Abdomen as in Hosei, but as broad as long, with three 

 pairs of distinct tubercles, the posterior being much the 

 longest ; the five smooth transverse ridges on the lower 

 surface not so thick as in Hosei. 



Measurements in viillirnetres. — Total length of trunk 9'5 ; 

 width of abdomen G, length up to the lateral pit 7, to poste- 

 rior border of head (3. 



Loc. Pinang Hill (2260 feet alt.), A single specimen 

 obtained by Mr. Stanley i'lower, of the Royal Museum, 

 Bangkok, Siam. 



The annexed table will serve to show the distinctive 

 characters of this and the other species of the genus known 

 to me : — 



a. The carapace very high and couvex, its posterior 



portion abruptly elevated above the level of the 

 abdomen; the basal segment of the mandible 

 very long, reaching nearly to the extremity of the 

 femur of the palp, only a smsiU portion of the 

 second segment visible from above ; maxillary 

 process of second leg very large and tliick alticeps, sp. n. 



b. Carapace low, posteriorly but little or no higher than 



the adjacent aiea of the abdomen j mandibles 



