Spiders and Opiltones.] SUBANTARCTIC ISLANDS OF NEW ZEALAND. 159 



Fam. DICTYNIDAE. 



Genus Amaurobius. 



Amaurobius, C. Koch, Ueb. Ar. Syst., vol. i, 1837, p. 15. Ciniflo, Blackwall, Tr. 

 Linn. Soc, xviii, 1841, p. 607. Amaurobius et Titanoeca, Thorell, Eur. 

 Spid., 1869-70, pp. 124-126 ; E. Simon, Ar. Fr., vol. i, 1874, pp. 207-220. 

 Amaurobius, E. Simon, Hist. Nat. des Ar., vol. i, p. 237. 



Amaurobius rubrioides, nov. sp. (Plate VII, figs. 2a, 26.) 



Colour. — Cephalothorax yellow-brown, with rather darker narrow median and 

 side stripes, and darker over the eye-area, sparsely covered with long brown up- 

 standing hairs. Eyes bright yellow. Mandibles dark red-brown ; fangs black at 

 base, red on lower half. 



Sternum, lip, maxillae, and coxae light yellow-brown. The skin of the ab- 

 domen appears to be moulting, but it is covered with short downlying and long 

 upstanding brown hairs. The legs are dark yellow-brown ringed with dark grey. 

 The palpi yellow. 



The cephalic part of the cephalothorax is well raised up, broad and straight 

 in front, and rounded at the anterior corners. The thoracic part is rounded at the 

 sides, and slopes steeply down to the margin. There is a deep fovea at the head of 

 the rear slope. 



The rear row of eyes is procurved, the upper edge of the laterals being on a 

 level with the lower edge of the median. They are equal in size, the median being 

 slightly more than their diameter apart, and the laterals twice their diameter there- 

 from. The front row is shorter than the rear, the laterals as large as the rear laterals, 

 on a common protuberance with them, half their diameter apart. The median eyes 

 are two-thirds the diameter of the laterals, twice their own diameter apart, and the 

 same distance from the laterals. The clypeus is rather more than twice the breadth 

 of the front median eyes. The distance between the front and rear median eyes 

 is twice the diameter of the former. 



The mandibles are long and powerful, conical, and slightly divergent ; the fangs 

 strong and well curved. On the inner margin of the falx-sheath are 2 small teeth, 

 and 1 large between 2 smaller on the outer. 



The maxillae are upright, straight on the inner and well rounded on the outer 

 side, and narrowing to the base. 



The lif is longer than broad, widest just above the basal constriction, straight 

 and slightly hollowed in front, where it is narrowest. 



The sternum is shield-shaped, straight, and not quite its widest in front, pointed 

 at the rear, where the coxae are half their breadth apart, and it slightly projects 

 between them. 



The legs are long and strong, tapering to the basal tarsal joints, furnished with 

 long hairs but no spines on the underside of the femoral joints and 2 spines above on 

 each. There are long single spines on the tibial and metatarsal joints. The superior 

 claws are stout, well curved at anterior end, with 9 pectinations on the basal half. 

 The inferior claw is smooth. There is no defined calamistrum, but short and long 

 thin hairs on the lower end of metatarsus iv. 



