178 SUBANTARCTIC ISLANDS OF NEW ZEALAND. [Spiders and Opilione^. 



Order OPILIONES, Sund. 



Suborder MECOSTETHI. 



Group INSIDIATORES, Loman. 



Fara. TRIOENONYCHIDAE. 



Genus Trioenonyx, Sorenseu. 



Trioenonyx, W. Sorensen, Arach. Austr. Zweiter Theil, p. 58, 1886 ; Dr. J. C. C. 

 Loman, Zool. Jahrb., band xvi, 1902 ; R. I. Pocock, Ann. & Mag. Nat. 

 Hist., ser. 7, vol. x, December, 1902, pp. 511 et seq. ; R. I. Pocock, Proc. 

 Zool. Soc, 1902, p. 392 et seq. 



Trioenonyx enderbei, no v. sp. (Plate VIII, figs, la-lc) 



Carapace. — Black-brown, with dingy yellow median stripe extending from the 

 eye tubercle half-way to the posterior edge. From this emanate side scrolls of same 

 colour on each side, the whole forming a shield-shape pattern. Behind this again, 

 and along the sides, are numerous faint yellow patches. The segmental area is 

 black-brown above, with small faint yellow spots round each segment ; on the under- 

 side the segmental spots are very clearly defined bright-yellow lozenges on a black 

 ground. As far as the sternum the black-brown is mottled with yellow ; the edges 

 are yellow. Over the coxal area the yellow colour prevails, mottled with black, 

 while the maxillary processes are wholly yellow. 



The legs are yellow, ringed with brown from the trochanter to the anterior end 

 of the metatarsus, the tarsus being brown. 



The palpi are black, mottled with clearly defined small yellow spots. 



The mandibles similarly are black, with a network of yellow spots. 



The dorsal carapace is very finely granulated, almost smooth, without tubercles 

 or spines, with the exception of a few short white bristles on the segments, and at 

 the sides close to the posterior end, and a tubercular projection on the front edge 

 each side of the eye tubercle. 



The eye tubercle is not quite marginal ; although enlarged at the base, it is 

 cylindrical, with a hemispherical top, the whole tubercle pointing forwards. It is 

 smooth, and the small yellow eyes on black rims are placed two-thirds of the length 

 from the base up the tubercle. 



The maxillary processes are triangular or pyramidal, higher at the end than 

 the nearly rectangular second piece, from which it is divided by a sulcus. 



Palp. — Trochanter : One spinous tubercle above. Femur : A longitudinal 

 median row of spinous tubercles on upper side, 1 very high round-headed on under- 

 side, 2 large and 3 smaller along the middle at base, and 1 at the inner side. Patella 

 smooth. Tibia : Two large and 1 smaller on the inner side, 3 large on the outer. 

 Tarsus : Four large and 1 small on the outer edge, 3 large and 3 small on the inner. 

 Rough tubercles on trochanter and femur. 



Coxae ii and iii roughly tubercled all over, but none on trochanter or femur. 



Coxae iv twice as broad as the others, a few scattered small tubercles and bristles. 



Tarsal segments 4, 10, 6, 5. 



