234 ARANEIDEA. 
ARGYROEPEIRA, Emerton. 
Argyroepeira lugens, Cambr. 
Opas lugens, Cambr. antea, p. 185, t. 23. fig. 3. 
For the reasons given above, p. 229, in respect to A. pulcherrima, Keys., this species 
(A. lugens) must also be referred to the genus Argyroepeira, unless some other 
distinction can be found beyond the absence of spines on the legs to differentiate it. 
DECETIA, gen. nov. (fam. Pholcide ; group Prisculeze, Sim.). 
Cephalothorax rather broader than long, almost circular ; thoracic indentation very strong ; behind it there is a 
somewhat angular or subconical elevation of the thorax, at the beginning of the posterior slope. Ocular 
area at the fore extremity forming a distinct but not very strong prominence. Clypeus of great height, 
strongly impressed below the eyes, but thence sloping forwards to the base of the falces ; its height is at 
least equal to one and a half times the length of the ocular area. 
Legs long, slender (those of the first pair were wanting), 4, 2, 3, apparently furnished with hairs only. 
Eyes rather closely placed, in three groups, three on each side of the fore extremity of the ocular area in a 
triangle, the third group of two (smallest of the eight) nearly contiguous and in an almost straight line 
with the anterior eye of each of the lateral groups, from which they are separated by an interval nearly 
equal to that which separates them from each other. The posterior row is straight. The hind-centrals, 
which are rather smaller than the hind-laterals, are contiguous to them. The laterals are of about equal 
size (perhaps the fore one is a little the largest), and they are near together but not quite contiguous. 
The interval between the hind-centrals is distinctly more than a diameter ; the central quadrangle is 
broader than long, and its fore side much the shortest. 
Mawille normal. 
Labium and sternum closely united, the junctional line just discernible. Sternum much broader than long, its 
posterior extremity broadly and sharply truncated in a line with the middle of the hinder end of the 
coxee of the fourth pair of legs, which are thus very wide apart. 
Abdomen short, much elevated above ; at its fore extremity on the underside is a large, triangular, corneous, 
deep red-brown shield, including the genital process and the ordinary spiracular plates ; halfway between 
these and the spinners is a long, strong, transverse, slightly angular fissure, probably leading to other 
spiracular organs. 
This genus is closely allied to Priscula, Sim., resembling it in the relative size and 
disposition of the eyes and general form of the abdomen, but differing in the form of 
the sternum and in the absence of the chitinous band between the clypeus and falces. 
Decetia incisa, sp. n. 
Adult female, length very nearly 2 lines. 
Cephalothorax pale orange-yellow, furnished above with bristly hairs, and with a broad central dark yellow- 
brown longitudinal band, somewhat broken and interrupted at the ocular area, and a lateral broken stripe 
of the same colour on each side, from which issue slight, indistinct, converging lines to the thoracic 
junction, 
Legs similar in colour to the cephalothorax, with the genuz and anannulus at the fore extremity of the femora 
and tibie yellow-brown ; tarsi very short. 
Falces small, rather projecting, straight, subconical, yellow-brown. 
Mawille dull orange. 
Labium dark yellow-brown. 
Sternum dull orange, broadly margined with dark yellow-brown. 
Abdomen much elevated in a blunt subconical form behind. It is of a dull orange-yellow or golden colour, and 
